A city in the Californian desert that was the home of Christopher Pike, recreated by the Talosians as a parkland picnic scene in The Cage.
Mojave is a city on Earth, in the desert region of California that shares its name. By the 23rd century the surrounding land has been turned into green parkland, with the gleaming city on the horizon.
It appears in the original Star Trek pilot, The Cage, and in the footage reused in The Menagerie. The Talosians, trying to make captivity appealing to Captain Christopher Pike, draw on his memories to place him and Vina at a picnic outside Mojave, complete with his horse Tango. Pike says he grew up there, and admits he had been thinking of going home.
The illusion fails to win him over, but it established a lasting piece of his background. Later series, including Discovery and Strange New Worlds, continue to treat Mojave as his birthplace.