- California12 objects
- North America12 objects
- The Americas12 objects
- United States12 objects
- Northern California10 objects
- CA-Sac-16 (Bennet Mound), Sacramento County, California5 objects
- Lassen County, California5 objects
- North Central California5 objects
- Northeastern California5 objects
- Sacramento County, California5 objects
- CA-Las-7, Karlo area, Lassen County4 objects
- Karlo area, Lassen County, California4 objects
- Ryer Island Ferry Site, Solano County, California2 objects
- San Francisco Bay Area, California2 objects
- Solano County, California2 objects
- Secret Valley, Lassen County, California1 objects