States Wildlife

Washington snakes: ID chart

12 snakes, 1 venomous (listed first), 1 mildly venomous. Last checked November 3, 2026.

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The venomous snake comes first: Western rattlesnake. The mildly venomous one follows. The rest follow from A to Z, each with a photo where we have one and a short note on where it lives in Washington. The chart prints on letter or A4 paper; on screen, open any name on the Washington snakes page for photos, range and sources.

Western rattlesnake
Photo: NPS Staff · Public domain · Wikimedia Commons

Western rattlesnake

Crotalus oreganus

Venomous

Western rattlesnakes occur east of the Cascade Mountains in the East Cascades, Columbia Basin, Okanogan, and …

Northern desert nightsnake
Photo: Jeremiah Degenhardt · CC BY 4.0 · iNaturalist

Northern desert nightsnake

Hypsiglena chlorophaea deserticola

Mildly venomous

In Washington, northern desert nightsnakes have been documented in the Columbia Plateau, Eastern Cascades …

California mountain kingsnake
Photo: Parsa Fard · CC BY 4.0 · iNaturalist

California mountain kingsnake

Lampropeltis zonata

Non-venomous

The Washington range is limited to the southernmost areas of eastern Skamania County and western Klickitat …

Common garter snake
Photo: kclarksdnhmorg · CC BY 4.0 · iNaturalist

Common garter snake

Thamnophis sirtalis

Non-venomous

The common gartersnake has the greatest geographical distribution of any gartersnake, occurring in all …

Common sharp-tailed snake
Photo: Parsa Fard · CC BY 4.0 · iNaturalist

Common sharp-tailed snake

Contia tenuis

Not stated

Common sharp-tailed snakes occur from British Columbia, Canada into southern California …

Desert striped whipsnake
Photo: Wendy St. John · CC BY-SA 4.0 · iNaturalist · resized

Desert striped whipsnake

Coluber [Masticophis] taeniatus taeniatus

Non-venomous

Striped whipsnakes reach the northern limit of their geographic range in Washington …

Gopher snake
Photo: National Park Service from USA · Public domain · Wikimedia Commons

Gopher snake

Pituophis catenifer

Non-venomous

Gopher snakes occur east of the Cascade Mountains primarily in the Columbia Basin and Okanogan ecoregions …

Northern rubber boa
Photo: NPS Staff · Public domain · Wikimedia Commons

Northern rubber boa

Charina bottae

Not stated

Northern rubber boas are found in all Washington ecoregions …

Northwestern gartersnake
Photo: Matt D'Agrosa · CC BY 4.0 · iNaturalist

Northwestern gartersnake

Thamnophis ordinoides

Non-venomous

Northwestern gartersnakes occur primarily west of the Cascades Mountain crest in the Northwest Coast, Puget …

Ring-necked snake
Photo: Peter Paplanus from St. Louis, Missouri · CC BY 2.0 · Wikimedia Commons

Ring-necked snake

Diadophis punctatus

Not stated

The main distribution of this species in Washington follows the east slope of the Cascade Mountains from the …

Terrestrial gartersnake
Photo: Yellowstone National Park · Public domain · Wikimedia Commons

Terrestrial gartersnake

Thamnophis elegans

Non-venomous

Terrestrial gartersnakes have been documented in all Washington ecoregions …

Western racer
Photo: Everglades NPS from Homestead, Florida, United States · Public domain · Wikimedia Commons

Western racer

Coluber constrictor

Not stated

The western yellow-bellied racer (Coluber constrictor Mormon) occurs in eastern Washington …

A picture cannot confirm what an animal is or that it is safe. Never handle a wild animal. Sources: Washington State Herp Atlas: Checklist of Washington Amphibians and Reptiles (pp. 13-14) (Washington Natural Heritage Program, Washington Department of Fish and Wildlife, BLM and U.S. Forest Service); Western rattlesnake (Crotalus oreganus) (Washington Department of Fish and Wildlife); Living with wildlife: Snakes (Washington Department of Fish and Wildlife); Northern desert nightsnake (Hypsiglena chlorophaea deserticola) (Washington Department of Fish and Wildlife); Gopher snake (Pituophis catenifer) (Washington Department of Fish and Wildlife); Desert striped whipsnake (Coluber [Masticophis] taeniatus taeniatus) (Washington Department of Fish and Wildlife); and others listed on the web page. stateswildlife.com/washington/snakes/