Washington snakes: ID chart
12 snakes, 1 venomous (listed first), 1 mildly venomous. Last checked November 3, 2026.
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
Crotalus oreganus
Venomous
Western rattlesnakes occur east of the Cascade Mountains in the East Cascades, Columbia Basin, Okanogan, and …
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
Lampropeltis zonata
Non-venomous
The Washington range is limited to the southernmost areas of eastern Skamania County and western Klickitat …
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
Contia tenuis
Not stated
Common sharp-tailed snakes occur from British Columbia, Canada into southern California …
Desert striped whipsnake
Coluber [Masticophis] taeniatus taeniatus
Non-venomous
Striped whipsnakes reach the northern limit of their geographic range in Washington …
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
Charina bottae
Not stated
Northern rubber boas are found in all Washington ecoregions …
Northwestern gartersnake
Thamnophis ordinoides
Non-venomous
Northwestern gartersnakes occur primarily west of the Cascades Mountain crest in the Northwest Coast, Puget …
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
Thamnophis elegans
Non-venomous
Terrestrial gartersnakes have been documented in all Washington ecoregions …
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/