Steam Vents
Steam vents at 13,426 feet on Mauna Loa represent some of Hawaii's most remote geothermal features, requiring a substantial hike through barren alpine terrain. Snow falls here 11 inches annually despite the tropical location.
The approach crosses desolate lava fields and sparse alpine vegetation, ascending into a landscape where temperatures drop to 38.8°F annually. Steam plumes rise against a backdrop of distant Pacific vistas, marking where volcanic heat persists above 13,000 feet.
These fumaroles exist where Mauna Loa's interior still retains heat from past volcanic activity. The extreme elevation and minimal vegetation reflect conditions more characteristic of temperate mountain ranges than tropical islands.
This hike covers 15 meters from North Pit Trail but demands serious preparation. Alpine weather changes rapidly, snow can close routes seasonally, and the thin air challenges unacclimatized visitors.
Is Steam Vents worth visiting?
Best for
- Easy day trips