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Cave · Volcano, Hawaii
Nāhuku (Thurston Lava Tube)
A lava tube of about 500 years inside the Volcanoes Park, reached by a short trail through a forest of tree ferns. The lit section can be walked in a few minutes.
Illustrative images. The pictures in this guide are illustrations based on the real place, not photographs, and may differ from it.
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About Nāhuku (Thurston Lava Tube)
The Nāhuku lava tube, also called Thurston Lava Tube, formed about 500 years ago when a river of lava cooled and hardened on the outside while the interior kept flowing. When the lava ran out, a hollow tunnel remained. It was named in English for Lorrin Thurston, a Honolulu newspaper editor who explored it in 1913 and advocated for the park’s creation.
The visit begins with a short trail that descends into a depression covered in wet forest, with tree ferns, the hāpuʻu, and ʻōhiʻa trees with red flowers. It’s common to hear native birds, such as the ʻapapane.
The section open to the public is about 200 meters, with an even floor and lighting, and enough height to walk standing up. The walls show marks of lava flow, and drops of water that seep through the rock hang from the ceiling. At the end, a stair climbs back to the forest.
The parking lot is small and fills during busy hours. The complete return, including the trail and the tunnel, is about 1 km.
Before you go
Practical information
Cidade Turismo reviews its information regularly, but something may have changed. Check with the place before planning your trip.
How much time to set aside
About 30 minutes.
Best time
Early morning or late afternoon, when there are parking spaces and the tunnel is less crowded.
How to get there
On Crater Rim Drive, about 3 km east of the Volcanoes National Park visitor center. The park entrance fee applies.
Tip
If the parking lot is full, leave the car at the Kīlauea Iki parking area and walk a short path. Bring a flashlight if you want to see the walls better.
Official website
Get your questions answered
Frequently asked questions about Nāhuku (Thurston Lava Tube)
How is a lava tube formed?
A lava river cools and hardens on the outside while the interior keeps flowing; when the lava drains away, a hollow tunnel remains.
How long does the visit to the Nāhuku lava tube take?
About 30 minutes, including the trail through the forest and the lit section of the tunnel.
Is the Nāhuku lava tube accessible?
The tunnel floor is even and lit, but the access includes sloped sections and stairs at the end.