- California53 objects
- North America53 objects
- Northeastern California53 objects
- Northern California53 objects
- Northern Sierras, Northern California53 objects
- Placer County, California53 objects
- The Americas✖Remove constraint Collection place: The Americas53 objects
- United States53 objects
- Martis Valley, Placer County, California28 objects
- CA-Pla-5 or 6, Placer County, California25 objects
- CA-Pla-5, Placer County, California4 objects
- CA-Pla-6, Placer County, California2 objects