- California18 objects
- North America18 objects
- The Americas18 objects
- United States18 objects
- Northeastern California17 objects
- Northern California17 objects
- Modoc County, California14 objects
- CA-Mod-27, Modoc County, California12 objects
- CA-Sis-223, Lower Klamath Lake, Siskiyou County3 objects
- Lower Klamath Lake Area, Siskiyou County, California3 objects
- Lower Klamath Lake, Siskiyou County, California3 objects
- Siskiyou County, California3 objects
- CA-Mod-25, Modoc County, California1 objects
- CA-Mod-36, Modoc County, California1 objects
- CA-Son-367, Sonoma County, California1 objects
- San Francisco Bay Area, California1 objects
- Sonoma County, California1 objects
- near Occidental, Sonoma County, California1 objects