Crystal Peak was an outdated command-center used by United States military.
Terminator 3: Rise of the Machines
After realizing Skynet was taking control over the military force and about to start the nuclear war, General Robert Brewster told John Connor and Kate Brewster to go to Crystal Peak. John and Kate misunderstood General Brewster and believe they can shut down the core system of Skynet there. John Connor, Kate Brewster and the T-850 head to Crystal Peak in order to destroy Skynet, only to find out that Skynet is not located here.
Behind the Scenes
- In an alternate ending to Terminator 3, the Skynet central core was indeed located at Crystal Peak, and was destroyed by a second T-850.