- North America542 objects
- The Americas542 objects
- United States✖Remove constraint Collection place: United States542 objects
- California524 objects
- North Central California522 objects
- Northern California522 objects
- Sacramento County, California442 objects
- CA-Sac-2 or 3 or 6 ('Johnson Mound'), Sacramento County, California411 objects
- CA-Sac-6, Sacramento County, California411 objects
- San Joaquin County, California80 objects
- CA-SJo-43, San Joaquin County, California44 objects
- CA-SJo-68, San Joaquin County, California30 objects
- CA-Sac-19, Sacramento County, California20 objects
- Bank of Clackamas River, Clackamas County, Western Oregon18 objects
- Clackamas County, Oregon18 objects
- Northwestern United States18 objects
- Oregon18 objects
- Western Oregon18 objects
- CA-SJo-48, San Joaquin County, California6 objects
- CA-Sac-1, Sacramento County, California4 objects