Nahuku (Thurston Lava Tube)
What to Expect
Safety Advisory
The lava tube floor is uneven and can be slippery from moisture dripping through the ceiling — wear closed-toe shoes with decent grip, not flip-flops.
Watch your head at the tube entrance and exit where the ceiling dips lower than you expect, especially if you are tall.
Trail Details
Pro Tips
Arrive before 9 AM or after 3 PM to avoid the tour bus crush — midday can feel like a theme park queue, and the parking lot fills fast.
Bring a small flashlight or use your phone light for the extended tube section beyond the lit portion — most visitors turn around at the end of the lit area and miss the quieter, more atmospheric unlit stretch.
After exiting the tube, take the short loop trail back through the rainforest rather than retracing your steps — it adds maybe five minutes and gives you a better look at the native bird life in the ohia canopy.
Photos
NPS
