- California3 objects
- North America3 objects
- The Americas3 objects
- United States3 objects
- Northern California2 objects
- CA-CCo-141, Palm Tract, Contra Costa County1 objects
- CA-Yol-52 (Holland Land site), Yolo County, California1 objects
- Contra Costa County, California1 objects
- Elk Slough, Yolo County, California1 objects
- Klamath River, Siskiyou County, California1 objects
- North Central California1 objects
- Northeastern California1 objects
- Palm Tract, Contra Costa County, California1 objects
- San Francisco Bay Area, California1 objects
- Siskiyou County, California1 objects
- Ti Bar, Ti Creek, Siskiyou County1 objects
- Ti Creek, Klamath River, Siskiyou County1 objects
- Unincorporated eastern Contra Costa County, California1 objects
- Yolo County, California1 objects