Utah mammals

Pinyon mouse in Utah

Peromyscus truei

Native to Utah S4 Apparently Secure in Utah

Not listed as nonindigenous in Utah by USGS NAS; native to its Utah range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

Pinyon mouse under loose bark showing large ears and long tailPinyon mouse on rocky soil with scattered seedPinyon mouse on weathered wood showing the long tailClose view of a pinyon mouse head and large ears
Photo: Don Loarie · CC BY 4.0Pinyon mouse under loose bark showing large ears and long tailPhoto: Amber M. King · CC BY 4.0Pinyon mouse on rocky soil with scattered seedPhoto: Don Loarie · CC BY 4.0Pinyon mouse on weathered wood showing the long tailPhoto: Don Loarie · CC BY 4.0Close view of a pinyon mouse head and large ears

Pinyon mouse in Utah, by the numbers

Common in Utah 7th most recorded of 141 mammals logged in Utah

4,227 occurrence records
7 with iNaturalist photos
Apr 4, 2026 Last seen in Utah

Records from 2000–2026.

4,227 total records count every Utah occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 4,199 records with a full observation date.

When to look for the Pinyon mouse in Utah

Most sightings fall in May to August.

4,199 Utah occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly Utah records (table)
MonthRecords
January10
February3
March38
April241
May800
June870
July860
August539
September472
October308
November44
December14

Monthly pinyon mouse occurrence records (iNaturalist and GBIF) in Utah, 2000–2026.

Seasonality

Year-round in Utah, with recorded sightings peaking in May–August.

Occurrence map

Where Pinyon mouse has been recorded in Utah

300 records mapped · zoom and drag to explore

300 Utah records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Grand Staircase-Escalante National Monument 723
Bears Ears National Monument 163
Capitol Reef National Park 120
Glen Canyon National Recreation Area 52
Dinosaur National Monument 44
Bitter Creek State Wildlife Area 39
Manti-La Sal National Forest 30
Canyonlands National Park 27

Protected places with the most pinyon mouse 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 Utah

CountyRecords
San Juan County 1,169
Garfield County 779
Tooele County 472
Kane County 349
Emery County 313
Uintah County 192
Wayne County 173
Grand County 142
Juab County 101
Washington County 97
Utah County 89
Millard County 64
11 other counties 287

The complete county distribution, spread across 23 Utah counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Utah’s pinyon mouse reports belong to rocky woodland country, especially around Canyonlands, Bears Ears, and the Book Cliffs. Even where a named-place count is small, that southeast-to-east Utah spread connects pinyon-juniper cover with ledges and broken slopes where the mice can shelter.

Reports gather from May through July, with another lift in September. Warm-season trapping and easier access can amplify that shape, and low reporting in another month doesn’t prove the mice are absent.

Occurrence data from iNaturalist and GBIF.

Pinyon mouse under loose bark showing large ears and long tail
Full species profile Pinyon mouse Peromyscus truei Size 10.2 cm4 in Weight 33 g1.2 oz Lifespan Up to 5.4 yr View the full profile

More mammals in Utah 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
  • NatureServe ExplorerCC-BYthe state conservation rank
  • 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"