Mount Graham

Mount Graham is the highest peak in the Pinaleño Mountains of southeastern Arizona, rising to about 3,267 metres. The mountain hosts a multi-institution research complex known collectively as the Mount Graham International Observatory.

Alpine trails and ridge routes lead into high-elevation forests and meadows; access to the summit area and observatory facilities is managed and in some cases restricted for operational and conservation reasons. The site draws interest for both astronomy and backcountry recreation, though permits and seasonal access rules often apply.

Construction of astronomical facilities took place in the late 20th century and resulted in a cluster of research telescopes on the upper slopes. The mountain’s ecology includes species restricted to its high-elevation habitats, and conservation concerns have shaped management decisions.

Mount Graham sits within Coronado National Forest in Graham County, Arizona, rising above the town of Safford and forming a distinct highland island in the otherwise arid region.

• Astronomical observatories: Home to a multi-institution observatory complex used for optical and infrared astronomy research.
• Endangered species: Contains habitat for the endangered Mount Graham red squirrel and other sensitive alpine species, which has influenced land-management and access.

What to See #

• Mount Graham International Observatory: A research telescope cluster and visitor-restricted facilities located near the summit, including the Large Binocular Telescope and other university-operated telescopes.