Hank, Parker Crater Hike Volcanoes Loop Backpack Details Backpack: Tropical, Island, Coastal Volcanoes National Park, Hawaii 3 days 39.1 miles 6,063 ft gain — 6,005 ft loss Physical Challenge 6 of 10 Psychological Challenge 8 of 10 Beauty 10 of 10 Uniqueness 10 of 10