• Halema`uma`u Just Before Dawn

    Hawai'i Volcanoes

    National Park Hawai'i

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  • April 22, 2014 - Temporary Closure of Mauna Loa Strip Road

    During the week of the 51st Annual Merrie Monarch Festival in Hilo, Hawaii, travel on the Mauna Loa Strip Road in Hawai‘i Volcanoes National Park will be restricted to hiking, biking and official motor vehicle traffic only. More »

Caves

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Nahuku - Thurston Lava Tube

NPS Photo

Caves within Hawaiʻi Volcanoes National Park are predominately lava tubes, although there are other types of subterranean voids including sea caves, earth cracks, pit craters, volcanic vents, rift magma chambers, caves caused by inflation of lava sheets, and tree casts. Associated with many of these features are sensitive resources that include invertebrates, cultural remains, paleontological deposits, and unusual geologic formations. Nahuku (Thurston Lava Tube) is open every day to the public.

Due to the sensitive and fragile nature of cave resources all other caves within the Park are closed to the general public as well as Park staff not involved in the direct management of the caves. Approved research permits are required for those interested in doing research in caves as well as for interpretive or educational purposes.

Did You Know?

Glowing, reddish-orange lava flowing on the surface at Hawai`i Volcanoes National Park

Kīlauea Volcano has erupted lava almost continuously from its east rift zone since 1983. These lava flows have added about 500 acres of new land to the southern shore of Kīlauea and covered 8.7 miles (14 km) of highway with lava as deep as 115 feet (35 m). More...