By Donna Durckel, County of San Diego Communications Office
Mar. 17, 2026 | 10:46 AM
Reading Time: 2 minutes
Rattlesnakes are common in San Diego, especially in rural or canyon areas and when the weather warms up. They are part of our ecosystem and play an important role in population control of small mammals such as rats and mice. Because of the part they play in local ecosystems, they are fully protected within San Diego County Parks.
Rattlesnakes are easily identifiable by their large triangular head, narrow neck, and wide body with a pronounced ridge running down the middle of their backs. Rattlesnakes are also less shiny than most other snakes in the County. Although rattlesnakes can be seen year-round in Southern California, most sightings occur from April to June.
