California
Snakes in Alameda County
29 species have been documented here, 2 of them venomous.
Venomous snakes in Alameda County
Full guide & what to do if bitten →
Western RattlesnakeCrotalus oreganusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Alameda County
Gopher Snake
Pituophis catenifer
Harmless
Western Rattlesnake
Crotalus oreganus
Venomous
Common Sharp-tailed Snake
Contia tenuis
Harmless
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
California King Snake
Lampropeltis californiae
Harmless
Aquatic Garter Snake
Thamnophis atratus
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
North American Racer
Coluber constrictor
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
No photo
Mexican Whip Snake
Masticophis lineatus
Harmless
Striped Racer
Masticophis lateralis
Harmless
Eastern Kingsnake
Lampropeltis getula
Harmless
Sierra Garter Snake
Thamnophis couchii
Harmless
Northern Rubber Boa
Charina bottae
Harmless
Long-nosed Snake
Rhinocheilus lecontei
Harmless
Coast Night Snake
Hypsiglena ochrorhynchus
Harmless
Tantilla selmae
Harmless
Sinaloan Nightsnake
Hypsiglena torquata
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Glossy Snake
Arizona elegans
Harmless
Pine Snake
Pituophis melanoleucus
Harmless
Western Glossy Snake
Arizona occidentalis
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Northwestern Garter Snake
Thamnophis ordinoides
Harmless
California Mountain Kingsnake
Lampropeltis zonata
Harmless
Red Cornsnake
Pantherophis guttatus
Harmless
Two-striped Garter Snake
Thamnophis hammondii
Harmless
Coastal Rosy Boa
Lichanura orcutti
Harmless
Mexican West Coast Boa Constrictor
Boa sigma
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.