Dark naked lava still not covered by vegetation since the last volcanic flow a few thousand years ago indicates the proximity to the impressive lava tube cave that can be accessed via a short half mile spur trail from here. Near its entrance is a public toilet and a water fountain, the last convenient water source along the PCT for 30 miles on the rim until it descends and reaches Hat Creek again. There are options to descend off trail at Lost Creek about 8 miles further. Hikers with time objectives bring extra water from here to save about an hour it costs to detour later.