Gray Peak, Mountain summit in Yellowstone National Park, Wyoming, US

Gray Peak is a summit in the Gallatin Range with a height of about 10,300 feet within Yellowstone National Park. The mountain lies west of Mammoth Hot Springs and is part of a complex mountain range in the region.

Gray Peak lies in the Gallatin Range, a range of the Rocky Mountains that extends into the remote northwest corner of Yellowstone National Park. The peak rises to 10,298 feet (3,139 m), a few kilometres south of the Montana state line. The sources record no volcanic origin for this summit; its documented setting is the Gallatin Range within the park.

The mountain is part of Yellowstone National Park's natural heritage and draws hikers who want to explore remote mountain landscapes. Visitors experience here the raw wilderness that defines the park.

Climbing the summit requires experienced hikers since there are no marked trails and navigation happens across wilderness. Nearby, Fawn Pass Trail goes through the mountains and offers an alternative for less experienced visitors.

The nearest maintained route, the Fawn Pass Trail, passes about 1 mile (1.6 km) south of the summit, skirting the mountain's southern face. Gray Peak stands roughly 9.1 miles (14.6 km) west-southwest of Mammoth Hot Springs and 8.9 miles (14.3 km) north of Mount Holmes.