Collection place
- Unincorporated western Contra Costa County, California321 objects
- CA-CCo-151, El Sobrante, Contra Costa County315 objects
- El Sobrante, Contra Costa County, California315 objects
- Middle Napa Valley, Napa County, California303 objects
- CA-Nap-32, Napa Valley, Napa County295 objects
- Rutherford area, Napa Valley, Napa County295 objects
- Richmond, Contra Costa County, California284 objects
- Sacramento County, California271 objects
- CA-Mrn-168, Marin County, California261 objects
- Marina Bay, Richmond, Contra Costa County260 objects
- Berkeley, Alameda County, California248 objects
- CA-CCo-295, Richmond, Contra Costa County248 objects
- CA-Ala-307, Berkeley, Alameda County247 objects
- West Berkeley, Berkeley, Alameda County247 objects
- Southern California237 objects
- Tehama County, California189 objects
- CA-Teh-1 (Kingsley Cave), Tehama County, California185 objects
- Northwestern California154 objects
- Point Reyes, Marin County, California146 objects
- Humboldt County, California138 objects