Leave a Comment / Backpack, Southern California / By Hank Leukart / January 11, 2018 December 26, 2022 The Last Oasis Joshua Tree Oases Hike Details Backpack: Desert Joshua Tree National Park, Southern California 18.1 miles 3,566 ft gain — 3,318 ft loss 2,472 ft min — 3,409 ft max Physical Challenge 6 of 10 Psychological Challenge 6 of 10 Beauty 7 of 10 Uniqueness 8 of 10