Mount Graham, Mountain summit in Graham County, Arizona, United States

Mount Graham is the 10,720-foot summit of the Pinaleño Mountains in Graham County, Arizona, about 70 miles northeast of Tucson. Its upper slopes and summit appear dark blue-gray with reddish-brown lower ridges, rising above a pale tan valley floor where a few trees stand in front of the foothills. The peak is often called "High Peak" locally, since "Mount Graham" also names the whole range.

The Pinaleño range lies near the northern edge of the Chiricahua Apache homeland and the southern margins of Western Apache territory. In 2002 the Keeper of the Register determined that Dził Nchaa Sí'an, as the Western Apache call it, qualifies for the National Register of Historic Places across roughly 330,000 acres, the largest such property. Congress authorized observatories on the summit in 1988, and the Vatican Observatory's VATT began operating in 1993, the first of three planned; the Large Binocular Telescope followed from 2004 with five German institutes involved.

The Western Apache name Dził Nchaa Sí'an means "Big Seated Mountain"; the range is one of their four holiest mountains and sacred to all Native peoples of the region. In Apache belief it is comparable to Mount Sinai, where they received the "32 Songs of Life" from their creator. Since 1992 Wendsler Nosie and the Apache Survival Coalition have held an annual Sacred Run from the San Carlos Reservation to the summit.

During summer, the Swift Trail allows vehicles to reach higher elevations easily, saving time for those wanting to explore the upper mountain area. Winter conditions close this road, requiring hikers to start from the Shannon Campground and walk the entire route.

The Vatican Observatory opened its VATT telescope on Mount Graham in 1993, the first of three planned observatories; the Large Binocular Telescope followed, with five German research institutes among its partners. Congress had authorized the site in 1988 through a rare peacetime waiver of U.S. environmental laws, which the San Carlos Apache and the Sierra Club opposed.