Steam Vents
Steam vents emerge where volcanic heat meets restricted military lands on Hawaii's Big Island. These fumaroles sit at 4,003 feet, just 36 meters from the road in the Kilauea Military Reserve.
Approaching from the volcanic plateau, visitors encounter active steam emissions rising from cracks in dark lava fields. The vents release heated gases in the cool mountain air at 62°F average temperature, surrounded by sparse volcanic vegetation.
Kilauea's geothermal activity produces these fumaroles through groundwater heated by subsurface magma. The military designation protects both sensitive operations and visitor safety in this active volcanic zone.
Public access remains closed to this site. The roadside location suggests visibility from nearby roads, though restrictions prevent close approach or direct visitation to the vents.
Is Steam Vents worth visiting?
Best for
- Easy day trips