Oregon mammals

Pacific Marten in Oregon

Martes caurina

Native to Oregon S4 Apparently Secure in Oregon

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

IUCN Red List status

NE – Not Evaluated

Not yet assessed against IUCN Red List criteria.

Photo: Pirataber · CC BY 4.0Pacific Marten (Martes caurina)Photo: Pirataber · CC BY 4.0Pacific Marten (Martes caurina)Photo: Pirataber · CC BY 4.0Pacific Marten (Martes caurina)Photo: noverholtz · CC BY-SA 4.0Pacific Marten (Martes caurina)Photo: Oregon State University · CC BY-SA 2.0Pacific marten Martes caurina

Pacific Marten in Oregon, by the numbers

Occasional in Oregon 73rd most recorded of 178 mammals logged in Oregon

293 occurrence records

107 with iNaturalist photos

Jul 6, 2026 Last seen in Oregon

Records from 2000–2026.

293 total records count every Oregon occurrence from GBIF and iNaturalist; the monthly chart covers the 292 records with a full observation date.

When to look for the Pacific Marten in Oregon

Most sightings fall in December to January.

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

Monthly Oregon records (table)

Month	Records
January	61
February	6
March	9
April	1
May	4
June	9
July	20
August	21
September	8
October	13
November	47
December	93

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

Seasonality

Year-round in Oregon, with recorded sightings peaking in December–January.

Occurrence map

Where Pacific Marten has been recorded in Oregon

293 records mapped · zoom and drag to explore

293 Oregon records mapped

Notable places to look

Park, forest, or monument	iNaturalist records
Crater Lake National Park	19
Newberry National Volcanic Monument	6
Three Sisters Wilderness	3
Diamond Peak Wilderness	2
Eagle Cap Wilderness	2
Mount Washington Wilderness	2
Umatilla National Forest	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 Oregon

County	Records
Deschutes County	88
Douglas County	64
Klamath County	49
Crook County	33
Lane County	26
Baker County	14
Wallowa County	11
Union County	2
Grant County	1
Coos County	1
Jackson County	1
Umatilla County	1
Other localities	2

The complete county distribution, spread across 12 Oregon counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Pacific-marten records are split among Oregon’s major high-forest blocks: the Cascades around Crater Lake, Deschutes, and Willamette, plus the northeastern Wallowa-Whitman country. August and December form separate reporting highs, rather than one continuous season of frequent observations. For a secretive forest carnivore, that pattern is strongly shaped by access and detection; it records encounters, not marten abundance.

Occurrence data from iNaturalist and GBIF.

Full species profile Pacific Marten Martes caurina Size 50–70 cm1.6–2.3 ft Weight 0.5–1.4 kg1.1–3.1 lb Lifespan Up to 17.8 yr View the full profile

More mammals in Oregon 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"