- California20,449 objects
- North America20,449 objects
- Northern California✖Remove constraint Collection place: Northern California20,449 objects
- The Americas20,449 objects
- United States20,449 objects
- Northeastern California13,408 objects
- Lassen County, California5,044 objects
- North Central California5,036 objects
- Northern Sierras, Northern California2,832 objects
- Modoc County, California2,683 objects
- Sacramento County, California2,314 objects
- Surprise Valley, Modoc County, California2,191 objects
- Northwestern California2,000 objects
- Siskiyou County, California1,765 objects
- Placer County, California1,551 objects
- Karlo area, Lassen County, California1,345 objects
- CA-Las-7, Karlo area, Lassen County1,337 objects
- CA-Mod-204, Modoc County, California1,301 objects
- CA-Sac-2 or 3 or 6 ('Johnson Mound'), Sacramento County, California1,146 objects
- CA-Sac-6, Sacramento County, California1,146 objects