Collection place
- Northern Sierras, Northern California7 objects
- CA-CCo-138, Oakley, Contra Costa County6 objects
- Marin County, California6 objects
- Oakley, Contra Costa County, California6 objects
- Berryessa Valley, Napa County, California5 objects
- Napa County, California5 objects
- CA-Mrn-307, Drakes Bay, Marin County4 objects
- CA-SJo-105, Stockton, San Joaquin County4 objects
- Drakes Bay, Point Reyes, Marin County4 objects
- Estero de Limantour, Drakes Bay, Marin County4 objects
- North Central California4 objects
- Point Reyes, Marin County, California4 objects
- San Joaquin County, California4 objects
- Stockton, San Joaquin County, California4 objects
- CA-Nap-93, Berryessa Valley, Napa County3 objects
- Unincorporated western Contra Costa County, California3 objects
- CA-CCo-151, El Sobrante, Contra Costa County2 objects
- CA-Mrn-168, Marin County, California2 objects
- CA-Nap-89, Berryessa Valley, Napa County2 objects
- CA-SFr-1, Farallon Islands, San Francisco County2 objects