Activities

HVNP: New Experience in Thurston Lava Tube

February 2, 2018, 4:30 PM HST
* Updated February 2, 2:41 PM
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Hawai‘i Volcanoes National Park announces that starting Monday, Feb. 5, 2018, visitors to the popular Thurston Lava Tube (Nāhuku) in the park can choose to the explore the cave in the dark with their own light source, or time their trip to coincide with a new lighting schedule.

A family explores the interior of Nāhuku during the illuminated hours. NPS Photo/Janice Wei

Park staff installed a new electrical system with 12 energy-efficient amber LED lights to illuminate the 400-foot-long lava tube – plus an additional amber spotlight to shine light on a low part of the cave ceiling. The lights will automatically turn on every day at 10 a.m., and will go out at 8 p.m. The cave will remain open overnight, but it will be pitch black inside from 8 p.m. until 10 a.m. the next day.

Visitors must carry their own light source if planning to explore the lava tube in its dark, natural state before 10 a.m. or after 8 p.m. Park rangers recommend head lamps and flashlights; cell phones are not recommended as the only light source.

“When we turned the lights off to install the new electrical system, visitors told us they were in favor of leaving an option for a ‘lights out’ natural cave experience in Nāhuku,” said Park Superintendent Cindy Orlando. “We’re excited that the new lighting schedule satisfies visitors, is better for the environment, and supports our goal for a sustainable future,” she said.

A prepared family wearing headlamps prepares to enter the Nāhuku during its dark, natural state. NPS Photo/Janice Wei

The new lighting system also increases visitor safety by illuminating the interior, and protects the cultural integrity of the ‘ana (cave) by inhibiting the growth of non-native plant and algae species.

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Located near the summit of Kīlauea Volcano off Crater Rim Drive, Nāhuku and its lush rainforest trail are popular features in the park. An eruption from Kīlauea 550 years ago produced vigorous streams of lava, and the long, hollow tunnel was left behind when the molten rock drained away.

New light schedule sign posted at Thurston Lava Tube (Nāhuku). NPS Photo.

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The native rainforest surrounding Nāhuku is home to endemic plant, bird and insect species, like the Happyface Spider. Visitation is heaviest between 10 a.m. and 2 p.m., and parking is limited to 30 minutes.

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