Mary Mountain-Nez Perce is a hiking trail in Park County and Teton County, Wyoming. It is within Yellowstone National Park. It is 20.2 miles long and begins at 7,218 feet altitude. Traveling the entire trail is 40.5 miles with a total elevation gain of 3,450 feet. Near the trailhead there are parking and a parking. The Mary Lake Cabin ranger station can be seen along the trail.
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