Arroyo Las Positas is a 7.4-mile-long (11.9 km)[2] westward-flowing watercourse in Alameda County, California, which begins at the confluence of Arroyo Seco and Cayetano Creek north of Livermore, and empties into Arroyo Mocho in Dublin, California.

[3]

This Alameda County, California–related article is a stub.

You can help Wikipedia by expanding it.This article related to a river in California is a stub.

You can help Wikipedia by expanding it.