Introduction: What? : This is one of the more challenging day-hikes in Grand Teton National Park. you will enjoy a panoramic view of the valley and lakes and the serene alpine lakes nested below the ragged mountain peaks. This is a strenuous hike, 10.5 miles out and back with climbing nearly 3,100 feet into the alpine wilderness, it took me 5 hours to complete. The trail's highest elevation at Amphitheater Lake is 9,698 feet.