Blacktail Deer Creek-Yellowstone River Trail, located near Mammoth, offers a moderate 12.5 one-way hike. This trail follows Blacktail Deer Creek as it descends 1,100 feet through rolling, grassy hills and Douglas-fir where it reaches the Yellowstone River. The trail continues across the Yellowstone River on a steel suspension bridge and joins the Yellowstone River Trail. The trail continues downriver, passing Knowles Falls and into arid terrain until it ends in Gardiner, Montana.

Trailhead: Blacktail Trailhead on the Mammoth-Tower Road, seven miles east of Mammoth.

Directions: From Mammoth, Travel seven miles east to Blacktail Trailhead on the Mammoth-Tower Road.

Elevation Gain: -1,100 feet

Distance: 12.5 miles

Difficulty: Moderate

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