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Let the crowds wait for Old Faithful: Experience the rugged side of Yellowstone National Park by trekking past steaming creeks and old-growth lodgepole en route to the sprawling Heart Lake and the regal Mount Sheridan on this 23.2-mile out-and-back. Check out more trip details, maps, and photos at backpacker.com/hikes/300069.
Kris Wagner, map editor