- "Situated north of Raton Canyon, there's no better place to lose yourself than the Chiliad Mountain State Wilderness. More people go missing here than anywhere else in San Andreas."
- — GTA V digital manual
It is based on the real life San Gorgonio Wilderness.
The State park is known for its wildlife and Hunting which Trevor Philips can participate in with Cletus Ewing who is a pro hunter. The park is also the location of the mission The Last One which is unlocked after 100% Completion of the game. The mission is famous as it involves tracking down, and killing bigfoot. Below is a list of known wildlife that inhabits the park.