Kitt Peak, Mountain observatory in Quinlan Mountains, Arizona, US.

Kitt Peak is a mountain in Arizona's Quinlan Mountains, reaching about 6,880 feet (2,097 meters), and home to a large collection of optical and radio telescopes operated by multiple research institutions. The site sits above the Sonoran Desert and offers open views of the surrounding landscape from its elevated position.

The Kitt Peak National Observatory was founded in 1958, and the site now holds around 20 optical telescopes, the largest with mirrors of 4 and 3.5 metres, plus two radio telescopes, one of which can be linked to the Very Long Baseline Array. The neighbouring MDM Observatory, owned by the University of Michigan, Dartmouth College, Ohio State, Columbia and Ohio University, keeps the 2.4-metre Hiltner Telescope built in 1986 and the 1.27-metre McGraw-Hill Telescope moved there in 1975.

The Tohono O'odham name the peak Ioligam, "red stick", after the manzanita bushes growing on its slopes. It is their second most sacred mountain after Baboquivari Peak. Near the summit lies I'itoi's Garden, held in their lore as the summer residence of the elder brother deity.

Night programs require advance registration, while daytime visits allow you to walk around the grounds and see several telescope buildings up close. The elevation brings cooler temperatures and stronger sun than the desert below, so layers and water are worth bringing.

The mountain's O'odham name, Ioligam, means "red stick", referring to the manzanita bushes growing on and around it. Near the summit lies I'itoi's Garden, which Tohono O'odham lore holds as the summer residence of the elder brother deity. The peak is the second-highest on the Tohono O'odham reservation, after Baboquivari Peak.