Yellowstone National Park · Idaho, Montana, Wyoming

Mary Mountain-Nez Perce Trail

20 mi of trail, end to end · about 1,300 ft of climbing · 7,218 ft–8,290 ft · earth surface · trail class Minimally Developed · hiking

7,224 ft 7,302 ft · 2.6 mi high 7,302 ft

Trailheads Mary Mountain Trailhead 7,698 ft Drive there · Mary Mountain West Trailhead 7,222 ft Drive there · Nez Perce Trailhead 7,222 ft Drive there

On the parks map

All 473 trails in Yellowstone National ParkFind a trailOn the parks mapPark on nps.gov

About this trail's facts

The lines are the National Park Service's public trails layer, the trailheads and the waterfalls, views, peaks and historic places along them the Service's public points of interest, read 2026-10-16 and simplified for the map; the length is the line's, end to end. The write-ups are the Service's own "things to do" text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the park's own site before you go.