Sierra de Velasco From Wikipedia the free encyclopedia This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Sierra de Velasco" – news · newspapers · books · scholar · JSTOR (November 2022) (Learn how and when to remove this message) The western part of Sierra de Velasco captures during summer moist air from the Atlantic allowing some sub-tropical forests to grow on it. Sierra de Velasco is a mountain range in the Argentine province of La Rioja. Sierra de Velasco runs from north to south just west of the city of La Rioja and east of Chilecito. This article about a place in La Rioja Province, Argentina is a stub. You can help Wikipedia by expanding it.vte