US Counties within California in which the Contra Costa goldfields, is known to or is believed to occur:

State County
California Alameda
California Contra Costa
California Glenn
California Lake
California Marin
California Mendocino
California Monterey
California Napa
California Sacramento
California Santa Barbara
California Santa Clara
California Solano
California Sonoma
California Tehama
California Trinity

This report contains Counties in which this species is known to or is believed to occur. If you are looking for the Section 7 range (for Section 7 Consultations), please visit the IPaC application.