Yellowstone National Park (Idaho, Montana, Wyoming)
Trail: Mary Mountain Trail
- Length: 20 miles round trip
- Sublocation: Southwest Quadrant
- Elevation Gain: 0 feet
- Trail Features/Description: Wildlife rich trail that traverses Mary Mountain el. 8,573 feet (2,613?m) between Alum Creek in the?Hayden Valley?and Nez Perce Creek on the?Firehole River.
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