Hikers moving through canyons in Ubehebe Country Ubehebe Country Loop Details Backpack: Desert, Slot Canyon Death Valley National Park, Northern California 3 days 21.2 miles 5,544 ft gain — 5,562 ft loss 1,755 ft min — 4,915 ft max Physical Challenge 5 of 10 Psychological Challenge 6 of 10 Beauty 6 of 10 Uniqueness 8 of 10