Mammals spotted on Pinnacle Peak include woodrats, mountain lions, coyotes, grey foxes, mule deer, rock squirrels, javelina, and desert cottontail. Reptiles recorded on the peak include gila monsters, desert tortoise, chuckwalla, desert spiny lizards, and a variety of snakes, including western diamondback rattlesnakes, black-tailed rattlesnakes, gopher snakes, common kingsnakes, coral snakes, and coachwhips.