The Sonoran Mountain Kingsnake is mostly active during the day when it pursues prey like lizards, frogs, snakes, and small mammals. They will hide out among rocks, logs, and under vegetation to escape excessive heat, hide from predators, or scope out prey.
They use constriction to subdue their prey, and are capable of consuming rattlesnakes, which is why they are called kingsnakes. Their coloration is similar to the colors of the coral snake. This is a form of defense called Batesian mimicry. Looking similar to a Coral Snake helps to ward off potential predators which include birds of prey, other snakes, lizards, and predatory mammals.
The females lay three to six eggs during the breeding season.