Mount Custer, Mountain summit in Glacier National Park, Montana, US

Mount Custer is a mountain in the Livingston Range of Glacier National Park, Montana, reaching 8,888 feet (2,709 m) along the Continental Divide. It rises more than 3,300 feet above Lake Nooney to the east, and Herbst Glacier lies immediately northeast of the peak. The mountain is composed of Precambrian to Jurassic sedimentary rock.

Mount Custer is probably named for George Armstrong Custer, the officer killed at the 1876 Battle of the Little Bighorn, known as Custer's Last Stand. The name is recorded in Glacier National Park's Livingston Range, along the Continental Divide.

The name Mount Custer probably refers to George Armstrong Custer, the officer killed at the 1876 Battle of the Little Bighorn. The peak stands in the Livingston Range of Glacier National Park, Montana, not in the Glacier-Waterton peace park across the Canadian border. Its summit rises more than 3,300 feet above Lake Nooney to the east.

Climbing this peak requires permits from Glacier National Park and physical fitness for technical rock work on steep terrain. Visitors should expect variable mountain weather and minimal facilities on the mountain itself.

The northeast face holds the Herbst Glacier, one of many ice formations within the park that have been shrinking over recent decades. This visible transformation illustrates how climate change is reshaping the high alpine environment.