Here for an interactive map of Yellowstone National Park. There is an entrance fee for Yellowstone National Park, but no permit is required to hike to Trout Lake.
Rating: Elevation Gain: 200 ft. (Easy), Distance: 1.2 Miles Roundtrip (Easy).
Time to Complete Hike: 1 hour.
MORE TRAIL WRITE-UPS ON YELLOWSTONE NATIONAL PARK