Idaho mammals

Pacific Marten in Idaho

Martes caurina

Native to Idaho S3 Vulnerable in Idaho

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

IUCN Red List status

NE – Not Evaluated

Not yet assessed against IUCN Red List criteria.

Pacific Marten in Idaho, by the numbers

Occasional in Idaho 60th most recorded of 123 mammals logged in Idaho

101 occurrence records
51 with iNaturalist photos

Records from 2000–2026.

101 total records count every Idaho occurrence from GBIF and iNaturalist; the monthly chart covers the 98 records with a full observation date.

When to look for the Pacific Marten in Idaho

Most sightings fall in December to January.

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

Monthly Idaho records (table)
MonthRecords
January17
February9
March3
April2
May2
June7
July13
August11
September6
October5
November9
December14

Monthly pacific marten occurrence records (iNaturalist and GBIF) in Idaho, 2000–2026.

Seasonality

Year-round in Idaho, with recorded sightings peaking in December–January, with a smaller rise in July–August.

Occurrence map

Where Pacific Marten has been recorded in Idaho

101 records mapped · zoom and drag to explore

100 Idaho records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Sawtooth National Recreation Area 6
Sawtooth Wilderness 4
Sawtooth Hatchery 1
Payette National Forest 1
Coeur d'Alene National Forest 1
Clearwater National Forest 1
Frank Church-River Of No Return Wilderness 1
Cecil D. Andrus-White Clouds Wilderness 1

Protected places with the most pacific marten 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 Idaho

CountyRecords
Custer County 17
Idaho County 14
Lemhi County 13
Shoshone County 12
Blaine County 11
Fremont County 8
Teton County 7
Valley County 5
Elmore County 5
Adams County 2
Boise County 2
Franklin County 1
4 other counties 4

The complete county distribution, spread across 16 Idaho counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Pacific marten records in Idaho cluster around Deer Flat and Camas national wildlife refuges and the Snake River corridor, though this forest carnivore’s real stronghold is the state’s higher conifer country rather than the river-valley refuges the record leans toward. NatureServe ranks the species S3, Vulnerable, in Idaho.

Reports peak in August and November, a pattern that likely tracks trapping and camera-survey timing more than a true two-season activity rhythm for an animal that hunts through dense canopy and downed timber year-round.

Occurrence data from iNaturalist and GBIF.

More mammals in Idaho 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"