Santa Cruz garter snake
- kingdom: Animalia
- phylum: Chordata
- class: Reptilia
- order: Squamata
- family: Natricidae
- genus: Thamnophis
- species: Thamnophis atratus
Albany- Anderson
- Belvedere
- Ben Lomond
- Berkeley
- Boulder Creek
- Broadmoor
- Brookdale
- Buena Vista
- Burlingame
- Calistoga
- Cambrian Park
- Capitola
- Carmel-by-the-Sea
- Castroville
- Corte Madera
- Cottonwood
- Cutten
- East Foothills
- East Palo Alto
- El Granada
- Fairfax
- Felton
- Gilroy
- Guerneville
- Healdsburg
- Highlands-Baywood Park
- Hillsborough
- Inverness
- Kensington
- Kentfield
- Lagunitas-Forest Knolls
- Lakeport
- Larkspur
- Lompico
- Los Altos Hills
- Los Gatos
- Lower Lake
- Marin City
- Millbrae
- Montara
- Moss Beach
- Mount Hermon
- Orland
- Pacific Grove
- Pacifica
- Palo Alto
- Piedmont
- Pine Hills
- Portola Valley
- Rio Dell
- Ross
- Saint Helena
- San Anselmo
- San Jose
- Sausalito
- Seaside
- Sebastopol
- Soquel
- Stanford
- Tamalpais Valley
- Tamalpais-Homestead Valley
- Union City
- Vallejo
- West Menlo Park
- Woodside
California
United States