The Friends of San Ramon Creek support programs and projects which promote a healthy San Ramon Creek and the 54-square mile San Ramon Creek watershed.
South San Ramon Creek drains the land area generally lying above the Bishop Subbasin of the Livermore Valley Groundwater Basin. The Bishop Subbasin comprises 1,666 acres (7 km2) of valley lands in the far northwestern portion of Livermore Valley Ground Water Basin. The Bishop Subbasin lies entirely within Contra Costa County, is drained by, and is a portion of that area locally designated as San Ramon Valley. The subbasin is bounded on the east and west by rolling hills composed of sediments of the Tassajara Formation. The creek is being actively protected as of 2007, by the city of San Ramon and other entities to preserve riparian zone habitat. The public Iron Horse Regional Trail runs along a portion of South San Ramon Creek.