The California mountain kingsnake (Lampropeltis zonata) is a species of nonvenomous colubrid snake that is endemic to North America.

[1] The California mountain kingsnake is endemic to western North America.

The majority of its range lies within the state of California, which is the reason for its common name.

California mountain kingsnakes have a banded pattern that consists of red, black, and white crossbands.

One population from Isla Todos Santos always lacks the red crossbands and is instead uniformly banded with black and white, similar in appearance to the related California kingsnake.