California mammals

Mountain Pocket Gopher in California

Thomomys monticola

Native to California

Not listed as nonindigenous in California by USGS NAS; treated as native to its mapped California range.

IUCN Red List status

NE – Not Evaluated

Not yet assessed against IUCN Red List criteria.

Mountain Pocket Gopher in California, by the numbers

Occasional in California 115th most recorded of 241 mammals logged in California

1,446 occurrence records
31 with iNaturalist photos

Records from 2000–2026.

1,446 total records count every California occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 1,442 records with a full observation date.

When to look for the Mountain Pocket Gopher in California

Most sightings fall in June to August.

1,442 California occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly California records (table)
MonthRecords
January0
February1
March23
April38
May44
June300
July343
August239
September163
October266
November22
December3

Monthly mountain pocket gopher occurrence records (iNaturalist and GBIF) in California, 2000–2026.

Seasonality

Year-round in California, with recorded sightings peaking in June–August, with a smaller rise in October.

Occurrence map

Where Mountain Pocket Gopher has been recorded in California

300 records mapped · zoom and drag to explore

300 California records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Yosemite National Park 169
Lassen Volcanic National Park 114
Tahoe National Forest 59
Desolation Wilderness 40
Lassen National Forest 21
Shasta National Forest 20
John Muir Wilderness 9
Stanislaus National Forest 8

Protected places with the most mountain pocket gopher sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in California

CountyRecords
Lassen County 201
Nevada County 185
Siskiyou County 176
Plumas County 157
Tuolumne County 118
Shasta County 108
Mariposa County 97
El Dorado County 74
Sierra County 70
Placer County 58
Mono County 54
Tehama County 39
10 other counties 109

The complete county distribution, spread across 22 California counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Mountain Pocket Gopher records reflect California’s dry interior, where sandy flats, open scrub, grassland, and desert basins form a patchwork rather than one continuous habitat. The Central Valley, Mojave Desert, and eastern rain-shadow valleys differ greatly in soil and vegetation.

Agriculture, roads, and expanding towns have broken up many lowland sites, especially in the San Joaquin Valley. Reports don’t measure abundance, and the scarcity of nighttime surveys can leave suitable-looking ground with few or no mapped observations.

The California record set contains 31 research-grade community observations. Monthly patterns can also reflect weather and observer activity, so they shouldn’t be treated as a direct count of animals.

Occurrence data from iNaturalist.

More mammals in California in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"