Gunsight Butte, Sandstone butte in Glen Canyon, Utah.

Gunsight Butte is a 4,678-foot (1,426 m) sandstone butte in Glen Canyon National Recreation Area, Kane County, Utah, 12 miles northeast of Page. It is an island rising nearly 1,000 feet (300 m) above Lake Powell when full. The butte consists of Entrada Sandstone overlain by Romana Sandstone and capped by Morrison Formation.

This sandstone formation developed about 160 million years ago during the Jurassic period from sediments of an ancient tidal flat. The Entrada Sandstone layers were later shaped into this distinctive form through erosion and weathering.

The butte's outline, with two peaks split by a notch, suggested a rifle sight to early mapmakers and gave the landmark its name. Aerial photographs taken before Lake Powell filled show the butte standing above the open canyon floor, and Barry Goldwater photographed it as well.

The butte is best viewed from Alstrom Point, which is accessed via an unpaved 23-mile route from Big Water that requires a high-clearance vehicle. Conditions are most passable during dry seasons, and visitors should bring adequate supplies and water.

Gunsight Butte is a butte that becomes an island in Lake Powell when the reservoir is full, standing nearly 1,000 feet (300 m) above the water. Its Entrada Sandstone is overlain by Romana Sandstone and capped by the Morrison Formation, the same layering seen at Padres Butte 3 miles east-southeast and Dominguez Butte 4 miles southeast.