Elevation: 7,600 ft.
Length: 20 miles (32 km)
Nez Perce Creek trailhead - 44°34′11″N 110°48′58″W
Alum Creek trailhead - 44°40′59″N 110°29′37″W
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.
This trail climbs gradually up over Mary Mountain and the park's Central Plateau to the Nez Perce trailhead between Madison and Old Faithful. Elk and bison can sometimes be seen in the distant meadows. The trail through Hayden Valley is often difficult to follow as bison regularly knock down the trail markers.