Abiathar Peak is a mountain peak with an elevation of 10,928 feet (3,331 m) in the northeastern section of Yellowstone National Park, in the Absaroka Range of the U.S. state of Wyoming.

It sits across and east of its better known neighbor, Barronette Peak.

The peak was named by members of the 1885 Hague Geological Survey to honor Charles Abiathar White, a geologist and paleontologist who had participated in early western geological surveys.

White never visited Yellowstone.

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