South Boundary Trail: Grassy Lake-South Entrance
South Boundary Trail: Grassy Lake-South Entrance is a 16.24-mile out-and-back foot trail in Yellowstone National Park, Wyoming. It climbs 1,046 ft to a high point of 7,720 ft. Difficulty: strenuous, from the NPS hiking-rating formula.
- 8.12 mione way
- 16.24 miround trip
- 1,046 ftelevation gain
- 7,720 fthigh point
- Strenuousdifficulty
Plan this hike
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