Seven Mile Hole Trail
ElevationAscent: 354' 108 m
Descent: -1,520' -463 m
High: 8,137' 2,480 m
Low: 6,736' 2,053 m
GradeAvg Grade: 7% (4°)
Max Grade: 47% (25°)
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“An out-and-back trail with stunning canyon views, thermal features, and pleasant campsites.”— Chris Higby
At mile 3.3, the trail begins the descent to the bottom of the canyon. At times, the trail is very steep and loose scree makes for poor traction. At mile 3.8, the trail passes by an igloo-shaped cone for an extinct hot spring. At mile 4.1, the trail enters an active thermal area with expansive views. The hot spring straight ahead (towards the canyon) as the trail enters the thermal area is the most impressive. You can hear it roaring from a distance and it puts off a lot of steam. Leaving the thermal area, the descent gets less steep and approaches the canyon walls again. At one point, another interesting cascade is visible across the canyon.
At the bottom, the trail reaches Sulphur Creek where it runs into the Yellowstone River. A number of small hot springs pour directly into the river and release a typical Yellowstone odor here. During the early-season, the force of the Yellowstone River is quite impressive. This makes a pleasant stop for lunch before turning around.
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Land Manager: National Park Service - Yellowstone National Park