About: Amador Valley

Amador Valley is a valley in eastern Alameda County, California and is the location of the cities of Dublin and Pleasanton. Part of Tri-Valley, the valley is bounded by the foothills of the Diablo Range on the north and south, Pleasanton Ridge to the west, and Livermore Valley to the east. Watercourses draining into the Amador Valley include South San Ramon Creek, , Arroyo Mocho, Arroyo Valle, and Arroyo Las Positas, as well as runoff from Pleasanton Ridge. These waters drain south through Arroyo de la Laguna to Alameda Creek, ultimately ending up in San Francisco Bay.