California State Route 99

State Route 99
SR 99 highlighted in red
Route information
Maintained by Caltrans
Length	424.85 mi[1] (683.73 km) (includes overlap with US 50 and I-5 in Sacramento)
Existed	1926 as US 99, 1964 as SR 99–present
Major junctions
South end	I-5 near Wheeler Ridge
Major intersections	SR 58 in Bakersfield SR 41 in Fresno SR 108 / SR 132 in Modesto SR 120 in Manteca SR 4 in Stockton US 50 / I-80 BL in Sacramento I-5 in Sacramento SR 70 near Nicolaus SR 20 in Yuba City SR 32 in Chico
North end	SR 36 near Red Bluff
Location
Country	United States
State	California
Counties	Kern, Tulare, Fresno, Madera, Merced, Stanislaus, San Joaquin, Sacramento, Sutter, Butte, Tehama
Highway system
State highways in California Interstate US State Scenic History Pre‑1964 Unconstructed Deleted Freeways
← US 99 → US 101

State Route 99 (SR 99) is a north–south state highway in the U.S. state of California, stretching almost the entire length of the Central Valley. From its southern end at Interstate 5 (I-5) near Wheeler Ridge to its northern end at SR 36 near Red Bluff, SR 99 goes through the densely populated eastern parts of the valley. Cities served include Bakersfield, Delano, Tulare, Visalia, Fresno, Madera, Merced, Turlock, Modesto, Manteca, Stockton, Sacramento, Yuba City, and Chico.

The highway is a remnant of the former Mexico to Canada U.S. Route 99 (US 99), which was decommissioned in 1972 after being functionally replaced by I-5 for long-distance traffic. The entire segment from Wheeler Ridge to Sacramento has been upgraded as of January 2016 to a freeway at least four lanes wide, and the California Department of Transportation (Caltrans) plans to further upgrade the segment to a minimum width of six lanes and also bring it into compliance with Interstate Highway standards as a parallel route to I-5 for Los Angeles–Sacramento traffic. North of Sacramento, the road ranges from a rural two-lane road to a four-lane freeway, with much of it following the route formerly designated as US 99E.

A 2024 study conducted by a Dallas law firm looked at federal data over a five-year span between 2018 and 2022, concluding that SR 99 is the most dangerous highway in California, with 445 deaths (an average of 89 per year) over that five-year period.^[2]

SR 99 is part of the California Freeway and Expressway System,^[3] and except for a small portion north of SR 20 is part of the National Highway System,^[4] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.^[5]

From its southern terminus at I-5 in Wheeler Ridge (Wheeler Ridge Interchange) to Sacramento, SR 99 is designated as the Golden State Highway.^[6] It passes through the major cities of the San Joaquin Valley, including Bakersfield, Delano, Tulare, Visalia, Fresno, Madera, Merced, Modesto, and Stockton. The entirety of this segment is now built to freeway standards with complete access control, although some older portions are not yet in compliance with Interstate Highway standards. The freeway sections connect and serve the agriculture and industry of the California Central Valley, connecting agricultural production with processing and packing businesses. Most of the freeway also parallels the Union Pacific's Fresno Subdivision.

The portion of the highway between Fresno and Madera has also been designated the 100th Infantry Battalion Memorial Highway, honoring the U.S. Army unit that was composed almost entirely with American soldiers of Japanese ancestry when it fought during World War II.^[6] Approximately 10 miles (16 km) north of Fresno in this segment, a palm tree and a pine tree (replaced with a cedar after storm damage in 2005) were planted in the median to mark the transition between Southern California (the palm) and Northern California (the pine), reputedly in the 1920s.^[7] The trees are to be removed in 2025 as part of widening the segment to six lanes, to be replaced by 15 pines and 15 palms to the west of the highway.^[8][9]

The portion between Salida and Manteca is designated the 442nd Regimental Combat Team Memorial Highway, honoring the US Army infantry regiment that, like the 100th Infantry Battalion, was also composed almost entirely of American soldiers of Japanese ancestry during World War II.^[6]

In Sacramento, SR 99 joins with I-80 Business as part of the Capital City Freeway, then runs concurrently with I-5. Caltrans route logs for SR 99 do not recognize these concurrencies and lists the route as having two segments. However, the highway is often shown with the concurrencies on maps, as a contiguous highway. Signage exists at the two Sacramento interchanges to direct traffic from one segment to the other.

SR 99 then splits from I-5 in northern Sacramento, and then heads along the eastern side of the Sacramento Valley through Yuba City, and Chico to its northern terminus at SR 36 near Red Bluff. SR 99 remains a four-lane freeway as the route leaves Sacramento County, but shortly reverts to a four-lane divided expressway as the highway crosses into Sutter County. As SR 99 reaches the junction of SR 70, the route turns northwest by north and becomes an undivided expressway with the exceptions of crossing the Feather River near Nicolaus and the interchange with SR 113, where the route then turns straight north to Yuba City.

As SR 99 crosses SR 20 at a signaled intersection, the highway becomes a four-lane freeway for 3 miles (4.8 km) before reverting to a two-lane road, passing the smaller towns of Live Oak, Fagan, and Gridley. SR 99 briefly is a local four-lane road through Gridley before continuing as a two-lane highway. SR 99 passes by the western side of the Thermalito Afterbay. SR 162 joins SR 99 for 2 miles (3.2 km) before splitting off east towards the northern end of the Thermalito Afterbay. SR 99 then transitions from a two-lane road to a four-lane divided expressway just before the interchange at SR 149 turning northwest and eventually a freeway entering the Chico city limits. As SR 99 leaves Chico, the highway reverts to a 2-lane road before crossing into Tehama County and passing through rural areas and the town of Los Molinos. The route then curves to the west and terminates at the junction with SR 36, approximately 1.5 miles (2.4 km) from I-5 in Red Bluff.

The first state highway bond issue, approved by the state's voters in 1910,^[10] included a north–south highway through the central part of the state consisting of Route 3 through the Sacramento Valley from the Oregon state line south to Sacramento, replacing the Siskiyou Trail, and Route 4 through the San Joaquin Valley from Sacramento to Los Angeles. In addition, a second route followed the west side of the Sacramento Valley, using Route 7 from Red Bluff south to Davis and the short Route 8 east along the proposed Yolo Causeway to Sacramento. North of Bakersfield these closely paralleled some of the main lines of the Southern Pacific Railroad, including the Fresno Line, East and West Valley lines, Shasta Line and Siskiyou Line.

By 1920 paving of both routes from Red Bluff to Los Angeles was completed or in progress, including the only mountain crossing south of Red Bluff, the Ridge Route just north of Los Angeles. To the north of Red Bluff, the road was being graded but had not yet been paved over the Siskiyou Mountains into Oregon.^[11] Paving was finally completed in mid-1933, when a new alignment (now SR 263) opened through the Shasta River Canyon.^[12]

The route from Davis to Oregon via Routes 7 and 3 came to be known as part of the Pacific Highway,^[13][14] an auto trail organized in 1910 to connect Canada and Mexico.^[15] The split in the Sacramento Valley was known as the East and West Side highways (the latter also carrying the Pacific Highway).^[16] South of Sacramento Route 4 was the Valley Route, but the San Joaquin Valley Tourist and Travel Association held a contest to rename it, selecting Golden State Highway as the winning entry in July 1927.^[17][18] To this day, "Golden State Highway" is SR 99's default name in areas not given other names by the Legislature, and the name continues from its end at Wheeler Ridge on I-5 as the Golden State Freeway from there to downtown Los Angeles.^[6]

This north–south central highway became part of US 99 in 1926, as part of the new United States Numbered Highway System developed by the American Association of State Highway Officials (AASHO),^[19] though signs were not posted in California until 1928.^[20][21] US 99 also continued southeast from Los Angeles along a paved state highway, Route 9 and 26, to US 80 in El Centro.^[22] The paved county road south from El Centro to the Mexican border became a state highway in mid-1931,^[23] and part of US 99 in mid-1932.^[24]

An east–west split routing north of Sacramento was approved in 1929.

In mid-1929, AASHO approved a split designation between Sacramento and Red Bluff, with US 99W replacing the original western route via Davis, and US 99E following the East Side Highway (Route 3) via Roseville.^[25] A short-lived split also existed between Manteca and Stockton in the early 1930s, with US 99E becoming the main route and US 99W becoming an extended SR 120 where not concurrent with US 50.^{[citation needed]}

A third highway heading north from Sacramento was constructed by the Natomas Company in the 1910s for 13 miles (21 km) along the Sacramento River levee to provide access to land reclaimed and sold by the company. Sacramento and Sutter counties continued the road alongside the Sacramento River and Feather River to Nicolaus, where an existing county road crossed the river on a drawbridge and ran north to the East Side Highway at Yuba City.^[26] This continuous roadway between Sacramento and Yuba City was dedicated in October 1924 as the Garden Highway.^[27]

Parts of the present SR 99 alignment between Sacramento and Yuba City were added to the state highway system in 1933, when the legislature added Route 87 (Sign Route 24,^[28] later US 40 Alternate) from Woodland north past Yuba City to northwest of Oroville,^[29] and in 1949, with the creation of Route 232 (later Sign Route 24) between Sacramento and Marysville.^[30] The final piece became Route 245 (no signed number) in 1959, connecting Route 232 near Catlett with Route 87 near Tudor,^[31] and following the old Garden Highway across the Feather River to a point east of Tudor. Despite this combined route connecting the same cities as the Garden Highway, the only other piece of the old county road taken for the state highway was a short segment just north of Sacramento, carrying Route 232 between Jibboom Street and El Centro Road.^[32]

When the Interstate Highway System was being planned in the 1950s, there were two proposals as to which way to route a freeway through the San Joaquin Valley. One was to upgrade US 99 to Interstate standards. The other proposed alternative was the West Side Freeway, which would bypass all the Central Valley communities and thus provide a faster and more direct north–south route through the state. The latter route was eventually chosen and ultimately became Interstate 5.

The implementation of the Interstate Highway System and the mid-1964 state highway renumbering ultimately sealed the fate of the U.S. Highway designation on US 99. The Interstates eventually replaced portions of US 99, causing it to be truncated at both of its ends.

US 99 was truncated to Los Angeles, with the old route south to Mexico becoming mainly I-10 and SR 86. At the same time Route 99 was defined legislatively to run from I-5 near Wheeler Ridge to Red Bluff, but it was only marked as SR 99 between Sacramento and Yuba City, since the remainder was still US 99 or US 99E.^[20] The southern end of US 99 was moved further north to Sacramento in late 1966 and SR 99 was extended to Wheeler Ridge; the rest of former US 99 to Los Angeles was either I-5 or the locally maintained San Fernando Road.^[33][34] Several years later US 99 and its branches were removed altogether from California, making SR 99 signage match the legislative definition; all of US 99W, and US 99 north of Red Bluff, remained as other routes (I-80, SR 113, and I-5), while US 99E between Roseville and Marysville became SR 65.^{[citation needed]} By 1968, all US 99 signs were removed or replaced with SR 99 signs following the completion of I-5.

During the 20th century, Caltrans gradually widened Route 99 into a four-lane expressway for the length of the entire segment from Wheeler Ridge to Sacramento. The agency did not immediately upgrade Route 99 to a freeway, since the West Side Freeway had already been selected as the preferred alternative for north–south long-distance traffic. As traffic levels along the Route 99 corridor continued to increase, the at-grade intersections on the expressway became extremely dangerous. Drivers on cross-streets who needed to cross the expressway often had to wait for many minutes at those intersections to find suitable gaps in which to dart across heavy through traffic on Route 99 moving at near-freeway speeds. If drivers became impatient or mistimed the speed of through traffic, the result was often a dangerous side collision. Therefore, Caltrans upgraded or replaced those intersections one-by-one with freeway interchanges, and often added frontage roads for access to adjacent parcels. This work proceeded very slowly over several decades, as Caltrans needed to balance the rising level of danger at the rural intersections on Route 99 with other urgent construction priorities in California's rapidly growing metropolitan areas.

By 2012, there was only one remaining expressway segment with at-grade intersections on Route 99 between Sacramento and Wheeler Ridge, in Merced County between the cities of Chowchilla and Atwater. On December 11, 2012, Caltrans commenced construction on a project to upgrade that segment to a six-lane freeway with full access control.^[35] On January 15, 2016, Caltrans officially opened the Plainsburg Road interchange, which completed the conversion of Route 99 south of Sacramento to a freeway built to near-interstate standards.^[36]

Caltrans' long-range plans recommend that SR 99 be upgraded to Interstate Highway standards between its southern end and Sacramento, which would require upgrading some substandard sections. Caltrans once suggested the route could be designated as either I-7 or I-9, in accordance with the Interstate Highway System's numbering standards (being just east of and parallel to I-5). However, the freeway is not currently part of the Interstate Highway system.^[37]

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).^[38] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

County	Location	Postmile [38][1][39]	Exit [40][41]	Destinations	Notes
Kern KER L0.75–57.58	​	L0.75	—	I-5 south – Los Angeles	Southern terminus of SR 99; no access to I-5 north; Wheeler Ridge Interchange; former US 99 south; I-5 north exit 221
			—	I-5 Truck south	Southbound exit only; truck lanes to I-5 south
	Mettler	2.73	3	SR 166 west – Maricopa, Santa Maria	Eastern terminus of SR 166
		4.02	4	Mettler (Mettler Frontage Road West)	Southbound exit and entrance
	​	5.34	5	David Road, Copus Road
	​	7.29	7	Sandrini Road
	​	9.30	9	Herring Road
	​	10.93	11	Union Avenue (SR 99 Bus. north) – Greenfield	Northbound exit and southbound entrance; former US 99 north
	​	13.41	13	SR 223 (Bear Mountain Boulevard) – Arvin
	​	15.43	15	Houghton Road
	Bakersfield	17.50	18	SR 119 west (Taft Highway) – Taft, Lamont	Former US 399; eastern terminus of SR 119
		18.52	19	Hosking Avenue
		19.54	20	Panama Lane
		21.08	21	White Lane
		22.60	23	Ming Avenue
		​	24A	SR 58 west (Westside Parkway)	Northbound exit and southbound entrance
		23.51– 23.62	24B	SR 58 east – Tehachapi, Mojave	West Bakersfield Interchange; signed as exit 24 southbound; southbound exit provides access to Stockdale Highway and Brundage Lane
		24.60	25	California Avenue – Civic Center
		25.65	26A	To SR 178 east (24th Street) / Rosedale Highway / SR 58 west – Lake Isabella, Buttonwillow	Signed as exit 26 southbound; northbound entrance is via Buck Owens Boulevard; former SR 58 west
		25.90	26B	Buck Owens Boulevard	Northbound exit and entrance
		26.78	27	Airport Drive – Oildale	Northbound exit and southbound entrance; serves Meadows Field Airport
		27.05	27	SR 204 south (Golden State Avenue / SR 99 Bus. south) to SR 178 east	Southbound exit and northbound entrance; northern terminus of SR 204; former US 99 south / US 466 east
		27.87	28	Olive Drive
		R28.56	29	Norris Road – Oildale	Southbound exit and northbound entrance
		R29.88	30	SR 65 north – Porterville, Sequoia National Park	Northbound exit and southbound entrance; southern terminus of SR 65
		R30.53	31	7th Standard Road, Merle Haggard Drive
	Shafter	36.52	37	Lerdo Highway
		R39.12	39	Merced Avenue
	​	R41.16	41	Kimberlina Road
	Famoso	44.31	44	SR 46 west (Paso Robles Highway) – Wasco, Paso Robles	Former US 466 west; eastern terminus of SR 46
	​	R47.37	47	Whisler Road
	McFarland	49.30	49	Sherwood Avenue	No northbound entrance
		49.95– 50.41	50	Perkins Avenue, Elmo Highway
	Delano	52.45	52	Pond Road
		54.48	54	Woollomes Avenue (SR 99 Bus. north)
		55.52	55	First Avenue	Northbound exit and southbound entrance
		55.52	56A	SR 155 east – Glennville, Wofford Heights	Signed as exit 56 northbound; western terminus of SR 155
		56.10	56B	Central Delano (11th Avenue)	Northbound exit is via exit 56
		56.54	57	Cecil Avenue	Southbound entrance is via exit 56B
Kern–Tulare county line		57.58	58	County Line Road (SR 99 Bus. south / CR J44)
Tulare TUL 0.00-R53.94	​	2.02	60	Avenue 16	Southbound exit and entrance
	​	3.06	61	Avenue 24	No southbound entrance
	Earlimart	6.15	64	Avenue 48 – Earlimart
		7.17	65A	Avenue 56 (CR J22) – Ducor, Alpaugh	Signed as exit 65 northbound; former Legislative Route 135
		7.24	65B	Alpaugh (Front Street)	Southbound exit only; former US 99 south
	​	9.71	67	Avenue 72, Avenue 76	Avenue 76 not signed southbound; northbound entrance is via exit 68
	​	10.20	68	Avenue 80, Avenue 76	Southbound exit and northbound entrance
	Pixley	12.30	70A	Avenue 96 (CR J24) – Pixley, Terra Bella
		12.80	70B	Court Street	No southbound entrance; northbound entrance is via exit 71
		12.90	70C	Pixley (Main Street)	Southbound exit only; former US 99 south
		13.33	71	Road 124	Northbound exit and entrance
		15.37	73	Avenue 120
	Tipton	18.43	76	SR 190 east – Tipton, Porterville, Springville	Western terminus of SR 190
		19.46	77	Avenue 152 (CR J26) – Tipton
	​	22.30	Raine Rest Area
	Tulare	23.49	81	Avenue 184
		25.43	83	Avenue 200 (SR 99 Bus. north)
		26.05	—	K Street (SR 99 Bus. north)	Closed in 2005; former northbound left exit and southbound entrance
		​		International Agri-Center Way	Proposed interchange[42]
		27.60	85	Paige Avenue
		28.61	86	Bardsley Avenue
		29.57	87	SR 137 (Tulare Avenue)
		30.58	88	Prosperity Avenue, Hillman Street, Blackstone Street	Blackstone Street not signed northbound; Hillman Street not signed southbound
		31.85	89	Cartmill Avenue	M Street was removed from southbound signage after interchange was reconstructed c. 2015
	​	​	90	Oaks Street	Closed; former northbound exit and entrance
	​	33.22	91	J Street (SR 99 Bus. south)	No northbound exit; former US 99 south
	​	33.94	92	Avenue 260, Avenue 264
	Visalia	36.41	94	Avenue 280, Caldwell Avenue (CR J30)
		R38.75	97	SR 198 (Sequoia Freeway) – Visalia, Sequoia National Park, Hanford, Lemoore	Signed as exits 96 (east) and 97 (west) northbound; SR 198 exit 101
	Goshen	39.93	98A	Avenue 304 – Goshen
		40.79	98	Betty Drive (CR J32)	Formerly signed as exit 98B
	Traver	48.20	106A	Traver (Drive 39)	Northbound exit only
		48.71	106B	Merritt Drive (CR J36) – Traver	Signed as exit 106 southbound
	​	51.81	109	Avenue 384 (CR J38) – Woodlake	Warlow Rest Area
Tulare–Fresno county line	Kingsburg	R53.82	111	Road 12, 18th Avenue
Fresno FRE R0.00–31.61		R0.95	112	SR 201 east (Sierra Street) – Kingsburg	Western terminus of SR 201
		R2.06	114	Bethel Avenue, Kamm Avenue
	Selma	R3.74	115	Mountain View Avenue (SR 99 Bus. north / CR J40)
		R5.32	117	Second Street
		6.43	118	SR 43 south (Highland Avenue) / Floral Avenue (SR 99 Bus. south) – Hanford, Corcoran	Northern terminus of SR 43
	Fowler	9.16	121	Manning Avenue (SR 99 Bus. north)
		11.10	123A	Merced Street	Signed as exit 123 northbound
		11.84	123B	Adams Avenue (SR 99 Bus. south)	Southbound exit and northbound entrance
	​	12.40	124	Clovis Avenue
	​	14.51	126	American Avenue	Southbound exit and northbound entrance
	Fresno	15.49– 15.86	127	Central Avenue, Chestnut Avenue
		16.93– 17.26	128	Cedar Avenue, North Avenue
		18.54	130	Jensen Avenue to SR 41 south	Former SR 41 south
		19.29	131	SR 41 north (Yosemite Freeway) – Yosemite	Northbound exit and southbound entrance; SR 41 south exit 126A
		19.29	131	SR 41 south (Yosemite Freeway) – Lemoore, Paso Robles	Northbound exit is via exit 130; SR 41 north exit 126A
		20.19	132A	Ventura Street, Kings Canyon Road	Former SR 180 east, earlier SR 41
		20.74	132B	Fresno Street – Civic Center
		21.01	133A	Stanislaus Street	Southbound exit and northbound entrance; former SR 180 west, earlier both directions
		22.16	133	SR 180 (Sequoia-Kings Canyon Freeway) – Mendota, Kings Canyon	Signed as exit 133B southbound; SR 180 exit 57A
		22.74	134	Belmont Avenue – Pine Flat Dam	Interchange scheduled to be permanently closed in 2026[43]
		23.30	135A	Olive Avenue	Signed as exit 135 southbound
		23.85	135B	McKinley Avenue	Northbound exit and southbound entrance; interchange scheduled to be permanently closed in 2026[43]
		24.42	136A	Golden State Boulevard	Southbound exit only; former US 99 south
		24.75	136B	Clinton Avenue	Signed as exit 136 northbound
		26.22	138A	North Golden State Boulevard	Northbound exit and southbound entrance; former US 99 north
		26.55	138B	Ashlan Avenue	Signed as exit 138 southbound
		28.10	140	Shaw Avenue
		​	141	Veterans Boulevard
		30.48	142	Herndon Avenue, Grantland Avenue	Northbound exit and southbound entrance
		30.99	143	Herndon Avenue (Golden State Boulevard)	Southbound exit and northbound entrance; former US 99 south
San Joaquin River		31.61 0.00	San Joaquin River Bridge
Madera MAD 0.00–29.36	​	R0.99	144	Avenue 7, Road 33
	​	R3.56	147	Avenue 9, Road 30½, Road 31½
	​	R7.46	151	Avenue 12, Road 29
	Madera	9.36	152	Almond Avenue	Southbound exit and entrance
		9.49	153A	Gateway Drive (SR 99 Bus. north)	Northbound exit and southbound entrance; former US 99 north
		10.27	153B	SR 145 (Madera Avenue) – Kerman, Firebaugh, Yosemite	Signed as exit 153 southbound
		11.01	154	Fourth Street – Central Madera
		12.13	155	Cleveland Avenue – Millerton Lake, Yosemite
		12.75	156	Avenue 16, Kennedy Street, Gateway Drive (SR 99 Bus. south)	Gateway Drive is former US 99 south
		R14.22	157	Avenue 17
	​	R16.33	159	Avenue 18½, Road 23
	​	R18.68	162	Avenue 20, Avenue 20½
	Fairmead	20.87	164	Road 20, Avenue 21½
		22.73	166	SR 152 west – Los Banos, Gilroy	Northbound left exit; no northbound entrance; eastern terminus of SR 152
	Chowchilla	23.77	167	Avenue 24
		24.43	168	Avenue 24½	No access across SR 99
		26.58	170	SR 233 (Robertson Boulevard) to SR 152 west / Avenue 26 – Chowchilla	Northern terminus of SR 233
	​	28.17	171	Road 15 – Le Grand
	​	29.33	Bridge over the Chowchilla River
Merced MER 0.00-R37.30	​	3.40	176	Plainsburg Road, Sandy Mush Road
	​	6.72	179	Le Grand Road – Le Grand
	Merced	R11.71	185	Mission Avenue, Campus Parkway
		13.09	186A	Childs Avenue, Motel Drive
		13.86	186B	SR 140 east – Mariposa, Yosemite	Southern end of SR 140 overlap
		14.08	186C	16th Street (SR 99 Bus. north)	Northbound exit and southbound entrance
		14.41	187A	G Street	Northbound exit and southbound entrance
		14.69	187B	SR 59 south (Martin Luther King Jr. Way) – Downtown Merced, Los Banos	Southern end of SR 59 overlap, signed as exit 187 southbound
		15.80	188	SR 59 north (V Street) / SR 140 west / R Street	Northern end of SR 59 / SR 140 overlap
		16.54	189	16th Street (SR 99 Bus. south)	No northbound exit
	​	18.51	191	Franklin Road	Northbound exit and entrance
	Atwater	20.52	193	Atwater-Merced Expressway
		21.61	194	Atwater Boulevard (SR 99 Bus. north)	Northbound exit and southbound entrance
		22.76	195	Applegate Road – Winton
		23.46	196	Atwater Boulevard (SR 99 Bus. south)	Southbound exit and northbound entrance
	​	25.03	198	Bellevue Road, Westside Boulevard (CR J18)
	​	27.13	200	Liberty Avenue, Sultana Drive
	Livingston	R29.00	201	Hammatt Avenue
		R30.38	203	Winton Parkway
	​	R31.93	204	Collier Road
	Delhi	33.53	206	South Avenue
		R34.43	207	Shanks Road – Delhi
	​	35.55	208	Bradbury Road
	​	R36.34	209	Golden State Boulevard (SR 99 Bus. north)	Northbound exit and southbound entrance
Stanislaus STA R0.00-R24.75	​	R0.30	Christoffersen Rest Area
	Turlock	R1.63	211	SR 165 (Lander Avenue, CR J14) – Central Turlock, Los Banos	Northern terminus of SR 165
		R3.45	213	West Main Street (CR J17) – Patterson, Central Turlock
		R4.54	214	Fulkerth Road
		R5.64	215	Monte Vista Avenue – Denair
		R6.75	217	Taylor Road (SR 99 Bus. south)
	Keyes	R7.81	218	Keyes Road (CR J16) – Keyes
	Ceres	R10.04	220	Mitchell Road
		11.30	221	Fourth Street	No southbound exit
		R11.91	222	Whitmore Avenue – Hughson
	Modesto	R13.26	223	Hatch Road	Signed as exits 223A (east) and 223B (west) northbound
		R13.90	224	South 9th Street (SR 99 Bus. north)	Southbound exit is part of exit 223; former US 99 north
		R14.47	225A	Crows Landing Road
		R15.10	225B	Tuolumne Boulevard, B Street
		R15.75	226A	Central Modesto (G Street, H Street, I Street)	Signed as exit 226 northbound
		R16.12	226B	SR 108 / SR 132 east / Maze Boulevard	Northbound exit is via exit 226; western terminus of SR 108
		R16.83	227	SR 132 west / Kansas Avenue – Vernalis
		M18.52	229	Carpenter Road (SR 99 Bus. south) / Briggsmore Avenue
		R20.22	230	Beckwith Road, Standiford Avenue
		R21.74	232	Pelandale Avenue
	Salida	R22.56	233	SR 219 (Kiernan Avenue) / Broadway – Salida, Riverbank
		R24.27	234	Hammett Road
Stanislaus River		R24.75 0.00	Stanislaus River Bridge
San Joaquin SJ 0.00–38.78	Ripon	0.89	236	Main Street
		1.71	237A	Milgeo Avenue	Northbound exit and entrance
		2.37	237B	Jack Tone Road (CR J5)	Signed as exit 237 southbound
	Manteca	4.89	240	Austin Road
		​	—	Moffat Boulevard	Closed; former northbound left exit
		5.82	241	SR 120 west to I-5 – Manteca, San Francisco	Southern end of SR 120 overlap; SR 120 east exit 6
		6.65	242	SR 120 east (Yosemite Avenue) – Sonora	Northern end of SR 120 overlap
		8.83	244A	Manteca (N. Main Street)	Closed; former southbound exit and northbound entrance
		9.18	244B	Lathrop Road, N. Main Street
		11.47	246	French Camp Road (CR J9)
	​	13.03	248	Frontage Road	Closed
	Stockton	14.61	250	Arch Road – Stockton Metropolitan Airport	Single-point urban interchange
		15.68	251	Clark Drive	Closed; former northbound exit and entrance
		16.70	252A	Mariposa Road (SR 99 Bus. north / SR 4 Bus. west / CR J7)	Former US 99 north
		17.22	252B	SR 4 east (Golden Gate Avenue) – Angels Camp	Southern end of SR 4 overlap; replaced exit located at Farmington Road
		18.02	253	Main Street	Northbound signage; closed
				Dr. Martin Luther King Jr. Boulevard	Southbound signage; closed; former SR 26 west; formerly signed as Charter Way; now accessible via exit 252B
		18.68	254A	SR 4 west to I-5 – Downtown Stockton, San Francisco	Northern end of SR 4 overlap; SR 4 east exit 68B
		19.29	254B	SR 26 east (Fremont Street) – Linden	Western terminus of SR 26
		20.34	255	SR 88 east (Waterloo Road) – Jackson	Western terminus of SR 88
		20.88	256	Cherokee Road
		21.67	257A	Wilson Way (SR 99 Bus. south) – Central Stockton	Southbound exit and northbound left entrance; former US 50 west / US 99 south
		21.91	257B	Frontage Road	Closed
		22.92	258	Hammer Lane (CR J8)
		24.03	259	Morada Lane
		25.42	260	Eight Mile Road
	​	27.50	262	Armstrong Road
	Lodi	28.48	263	Harney Lane
		29.00	264A	Lodi (SR 99 Bus. north, Cherokee Lane)	Northbound exit and southbound entrance; former US 50 east / US 99 north
		29.50	264B	SR 12 west (Kettleman Lane) – Fairfield	Southern end of SR 12 overlap; signed as exit 264 southbound
		30.97	266	SR 12 east – Central Lodi, San Andreas	Northern end of SR 12 overlap
		31.58	267A	Turner Road (SR 99 Bus. south, Cherokee Lane)	Former US 50 west / US 99 south
	​	31.72	267B	Frontage Road
	​	32.57	268	Woodbridge Road
	​	33.57	269	Acampo Road
	​	34.58	270	Peltier Road (CR J12)
	Collierville	35.60	271	Jahant Road
		36.67	272	Collier Road
		37.83	273	Liberty Road, Frontage Road
South Fork Dry Creek		38.78 0.00	Bridge
Sacramento SAC 0.12–36.86	Galt	0.33	274A	Crystal Way, Boessow Road	Northbound exit and entrance
				Fairway Drive	Southbound exit and entrance
		0.79	274B	Central Galt (C Street, A Street)
		1.57	275A	Elm Avenue, Simmerhorn Road (CR J10)
		1.88	275B	Pringle Avenue	Southbound exit and entrance
				Ayers Lane	Northbound exit and entrance
		2.70	276	Walnut Avenue	No access across SR 99
		3.53	277	SR 104 east (Twin Cities Road, CR E13) – Jackson	Western terminus of SR 104
	​	4.39	278	Mingo Road	Northbound exit and entrance
	​			West Stockton Boulevard	Southbound exit and entrance
	​	6.01	280	Arno Road
	​	7.36	281	Dillard Road
	Elk Grove	8.96	283	Eschinger Road	Southbound exit and entrance
		10.07	284	Grant Line Road (CR E2), Kammerer Road
		12.76	286	Elk Grove Boulevard (CR E12)
		13.84	287	Laguna Boulevard, Bond Road
		14.87	288	Sheldon Road
	Sacramento	​	—	Jacinto Road	Closed; former southbound exit and entrance
		15.90	289	Cosumnes River Boulevard, Calvine Road
		17.24– 17.66	291	Stockton Boulevard, Bruceville Road, Mack Road	Signed as exits 291A (Mack Road east, Bruceville Road) and 291B (Mack Road west) southbound; Stockton Boulevard is former US 50 east / US 99 north
		19.61	293	Florin Road	Signed as exits 293A (east) and 293B (west)
		20.86	294	47th Avenue	Signed as exits 294A (east) and 294B (west)
		21.57	295	Martin Luther King Jr. Boulevard	Northbound exit and southbound entrance
		21.94	296	Fruitridge Road	Northbound exit to Fruitridge Road east is via exit 295
		23.13	297	12th Avenue
		24.19	298B	Broadway (CR J8)	Southbound entrance only; former US 50 / US 99
		R24.35 2.48[a]	—	US 50 east (Lincoln Highway) / I-80 BL east (Capital City Freeway east) – Reno, South Lake Tahoe	North end of state maintenance; left exit southbound, left entrances for US 50; left entrance southbound, left exits for I-80 BL; eastern terminus of unsigned I-305; southern end of US 50 / I-80 BL / I-305 overlap; northbound access to I-80 BL east and southbound access from US 50 west via unsigned SR 51; I-80 BL is former I-80 east; US 50 west exit 6B; I-80 BL west (SR 51 south) exit 6A
		1.37[a]	5[b]	16th Street	Northbound exit and southbound entrance; former US 99W[44] / SR 160
				15th Street	Southbound exit and northbound entrance; former US 99W[44] / SR 160
		0.61[a]	4B[b]	10th Street – Downtown Sacramento	Northbound exit and southbound entrance
		0.35[a]	—	US 50 west (I-80 BL / I-305 west) to I-80 – San Francisco	North end of US 50 / I-80 BL / I-305 overlap; northbound left exit and southbound left entrance; US 50 / I-80 BL east exit 4A; former I-80 west
			—	I-5 south – Los Angeles	Northbound left exit and southbound left entrance; I-5 north exit 518
		22.57[c]	—	X Street, Broadway	Southbound exit and northbound entrance
			—	US 50 west (I-80 BL / I-305 west) to I-80 – San Francisco	Southbound exit only; US 50 / I-80 BL east exit 4A
			—	I-5 south – Los Angeles	Southern end of I-5 overlap; southbound left exit and northbound left entrance; I-5 north exit 518
		23.18[c]	519A[d]	Q Street	Entrances are via P Street; serves Golden 1 Center
		23.80[c]	519B[d]	J Street – Downtown Sacramento	Entrances are via I Street; serves Golden 1 Center
		24.65[c]	520[d]	Richards Boulevard
		25.34[c]	521A[d]	Garden Highway	Signed as exit 521 southbound
		25.97[c]	521B[d]	West El Camino Avenue	Northbound exit and southbound entrance
		26.72[c]	522[d]	I-80 – San Francisco, Reno	Former I-880; I-80 exit 86
		28.05[c]	524[d]	Arena Boulevard
		29.02[c]	525A[d]	Del Paso Road
		29.91[c] R32.12	306	I-5 north – Woodland, Redding	South end of state maintenance; left exit northbound, left entrance southbound; SR 99 north follows I-5 exit 525B
		33.36	307	Elkhorn Boulevard (CR E14) – Rio Linda
	​	35.37	309	Elverta Road
Sutter SUT 0.00–42.39	​	0.95	311	Riego Road
	​		Northern end of freeway
	​	5.81	316	Howsley Road – Pleasant Grove	Interchange
	​	R8.07	319	SR 70 north – Marysville, Oroville	Interchange; northbound exit and southbound entrance; southern terminus of SR 70; former US 40 Alt.
	​	11.98		Nicolaus (Garden Highway, Nicolaus Avenue)
	​	20.99		SR 113 south – Woodland	Interchange; northern terminus of SR 113; connects to East Tudor Road (former SR 99 south)
	Yuba City	T30.63		SR 20 (Colusa Avenue) – Colusa, Marysville	At-grade intersection
			Southern end of freeway
		R31.31	342	Queens Avenue
	​	R33.95	344	Eager Road
	​		Northern end of freeway
Butte	​	11.16		SR 162 west – Butte City, Willows	Southern end of SR 162 overlap
	​	13.16		SR 162 east – Oroville	Northern end of SR 162 overlap
	Durham	21.81		SR 149 south to SR 70 – Oroville, Marysville	Interchange; left exit southbound, left entrance northbound; northern terminus of SR 149
		23.86	376	Durham (Durham-Dayton Highway)	Interchange
	Chico	R30.60	Southern end of freeway
			383	Park Avenue, Skyway (SR 99 Bus. north)
		R31.50	384	East 20th Street
		R32.45	385	SR 32 – Orland, Chester
		R33.28	386	East First Avenue
		R34.25	387A	Cohasset Road, Mangrove Avenue
		R34.93	387B	East Avenue
		R36.31	389	Eaton Road	Roundabout at northbound exit and entrance
			Northern end of freeway
	​	​		Esplanade (SR 99 Bus. south)
Tehama TEH 0.00–24.94	​	4.49		CR A9 (South Avenue) to I-5 – Corning, Woodson Bridge State Recreation Area
	​	24.94		SR 36 – Lassen National Park, Susanville	Northern terminus of SR 99; highway continues as SR 36 west (former US 99E north)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Closed/former       Concurrency terminus       Incomplete access       Unopened

State Route 99 Business
Location	Bakersfield, California

State Route 99 Business (SR 99 Bus.) in the city of Bakersfield follows Union Avenue and Golden State Avenue. Traveling north on SR 99, the business route begins at exit 11 (Union Avenue), and follows the original routing of US 99. Union Avenue is a rural, four-lane road for about six miles (9.7 km) until it enters Greenfield at Panama Road. From there, it continues north, passing by the Bakersfield Municipal Airport and the Kern County Fairgrounds. Union Avenue widens to six lanes at Ming Avenue, just a few miles before its intersection with SR 58. At the SR 58 junction, the designation SR 204 is added to the route. SR 99 Bus./SR 204 continues north on Union Avenue until the Union Avenue Y-intersection, where the designation heads northwest on Golden State Avenue. The route passes under SR 178 and over Chester Avenue at Garces Memorial Circle. At F Street, SR 99 Bus./SR 204 becomes a short four-lane freeway that terminates at SR 99 just before the Olive Drive exit.

Major intersections

The entire route is in Kern County.

Location	mi	km	Destinations	Notes
​	0.0	0.0	SR 99 south – Los Angeles	Interchange; southern terminus; no access to SR 99 north; former US 99 south; SR 99 north exit 11
Module:Jctint/USA warning: Unused argument(s): state
​	2.8	4.5	SR 223 (Bear Mountain Boulevard)
Greenfield	6.8	10.9	Taft Highway, Panama Road – Lamont, Taft, Maricopa	Former US 399 south; connects to SR 119
Bakersfield	8.8	14.2	Panama Lane
	10.3	16.6	White Lane
	11.8	19.0	Ming Avenue, Casa Loma Drive
	12.7	20.4	SR 58 – Mojave	Interchange; south end of SR 204 overlap; southern terminus of SR 204; SR 58 exit 112
	12.7 17.6	20.4 28.3	SR 99 Bus. overlaps with SR 204
	17.6	28.3	SR 99 north – Fresno, Sacramento	Interchange; northern terminus; north end of SR 204 overlap; no access to SR 99 south; northern terminus of SR 204; former US 99 north / US 466 west; SR 99 south exit 27
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

State Route 99 Business
16th Street
Location	Merced, California

State Route 99 Business (SR 99 Bus.) in the city of Merced follows 16th Street. The business route begins at SR 99 exit 186C and follows the original routing of US 99. It passes near downtown Merced and is concurrent with SR 59 for a short distance. SR 99 Bus. ends at SR 99 exit 189.

Major intersections

The entire route is in Merced County.

Location	mi	km	Destinations	Notes
Merced	0.0	0.0	SR 140 east – Mariposa, Yosemite	Continuation beyond SR 99
	Module:Jctint/USA warning: Unused argument(s): state
	0.0	0.0	SR 99 south – Los Angeles	Interchange; southern terminus; no access to SR 99 north; former US 99 south; SR 99 north exit 186C
	0.5	0.80	G Street – Downtown Merced	Serves UC Merced, Dignity Health – Mercy Medical Center Merced
	0.8	1.3	Martin Luther King Jr. Way – Downtown Merced	Serves Merced County Fairgrounds; connects to SR 59 south / SR 99
	1.0	1.6	M Street (Veterans Boulevard) – Civic Center	Serves Merced College
	1.5	2.4	R Street	Connects to SR 99 south
	1.9	3.1	SR 59 south (V Street) to SR 140 west – Gustine	South end of SR 59 overlap; connects to SR 99 north; serves Merced Regional Airport
2.2	3.5	SR 59 north (Snelling Highway) – Snelling, Coulterville, Lake McClure, Sonora	North end of SR 59 overlap; serves UC Merced, Merced College
​	3.0	4.8	SR 99 – Sacramento, Los Angeles	Interchange; northern terminus; no access to 16th Street from SR 99 north; former US 99 north; SR 99 south exit 189
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

State Route 99 Business
Cherokee Lane
Location	Lodi, California

State Route 99 Business (SR 99 Bus.) in the city of Lodi follows Cherokee Lane. Traveling north on SR 99, the business route begins at exit 264 (Lodi exit), and follows the original routing of US 99, as well as US 50. Cherokee Lane is a four-lane thoroughfare for much of the business route. It ends at SR 99 at exit 267A (Turner Road).

Major intersections

The entire route is in Lodi, San Joaquin County.

mi	km	Destinations	Notes
0.0	0.0	Cherokee Lane	Continuation beyond Century Boulevard
Module:Jctint/USA warning: Unused argument(s): state
0.0	0.0	SR 99 south / Century Boulevard	Interchange; southern terminus; no access to SR 99 north; Century Boulevard not accessible northbound; former US 50 west / US 99 south; SR 99 north exit 264
0.7	1.1	SR 12 (Kettleman Lane) – San Andreas, Rio Vista
2.2	3.5	Victor Road to SR 12 east
2.8	4.5	SR 99 / Turner Road – Fresno, Sacramento	Interchange; northern terminus; former US 50 east / US 99 north; SR 99 exit 267A
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Incomplete access

• California Roads portal
• Tule fog

Wikimedia Commons has media related to California State Route 99.

• Caltrans: State Route 99 highway conditions
• Caltrans Traffic Conditions Map
• California Highway Patrol Traffic Incidents
• Route 99 at California Highways
• July 24, 2005, San Francisco Chronicle article on Interstate upgrade
• California 99 at AARoads.com
• Virtual Tour of US 99 north of Los Angeles
• Historic Highway 99 Association of California