Collection place
- Northern Sierras, Northern California55 objects
- Drakes Bay, Point Reyes, Marin County52 objects
- Estero de Limantour, Drakes Bay, Marin County51 objects
- NV-La-1104, Lander County, Nevada51 objects
- Downtown San Francisco, San Francisco, San Francisco County47 objects
- North Central California43 objects
- Napa County, California40 objects
- Napa Valley, Napa County, California38 objects
- Site N-5 (North Shore Pump Station), San Francisco Waterfront, San Francisco37 objects
- CA-Mrn-307, Drakes Bay, Marin County33 objects
- Lower Napa Valley, Napa County, California32 objects
- CA-Nap-16, Napa Valley, Napa County31 objects
- CA-SFr-119H, San Francisco County, California30 objects
- Humboldt County, Nevada30 objects
- Paradise Valley, Humboldt County, Nevada29 objects
- Buckingham site, Paradise Valley, Humboldt County28 objects
- CA-SBn-1, Mission San Juan Bautista, San Benito County25 objects
- Mission San Juan Bautista, San Juan Bautista, San Benito County25 objects
- San Benito County, California25 objects
- San Juan Bautista (town), San Benito County, California25 objects