Collection place
- Shasta County, California70 objects
- Lower Klamath Lake Area, Siskiyou County, California66 objects
- Lower Klamath Lake, Siskiyou County, California66 objects
- Surprise Valley, Lassen County, California63 objects
- Fall River Valley, Shasta County, California61 objects
- CA-Las-194, Surprise Valley, Lassen County53 objects
- CA-Mod-27, Modoc County, California48 objects
- Sierra County, California43 objects
- CA-Pla-5 or 6, Placer County, California42 objects
- CA-Sha-52, Shasta County, California41 objects
- CA-Sis-223, Lower Klamath Lake, Siskiyou County33 objects
- Tuolumne County, California32 objects
- CA-Cal-114, Calaveras County, California24 objects
- Big Lake, Fall River Valley, Shasta County20 objects
- CA-Mod-214, Modoc County, California19 objects
- CA-Nev-46, Nevada County, California19 objects
- Honey Lake Valley, Lassen County, California17 objects
- CA-Sie-8, Sierra County, California16 objects
- CA-Pla-414, Placer County, California15 objects
- CA-Cal-83, Calaveras County, California14 objects