Acid War Zone Trail

Acid War Zone Trail is a 1.25-mile out-and-back from the mile-38 pullout to Nākālele Point’s beacon and the Nakalele Blowhole. It crosses rutted dirt tracks and pitted coastal lava, so the short mileage feels rougher than it looks. Allow about 1.5 hours with time at the water. If you only want the blowhole, the separate mile-38.5 descent is shorter; this row follows the longer lighthouse-side approach.

The first stretch is a network of broad, eroded dirt tracks. Stay with the routes closest to the shoreline, then follow the main line inland near the first turn and back northeast toward the headland. Smaller tracks peel into trees, and it’s easy to lose the faint tread, so keep the mapped route available. Ruts can hold mud after rain.

The trail passes close to a white navigation beacon, then drops across old lava and bends along the coast to the blowhole. The return is the same route.

This is a rugged, informal path rather than a maintained nature trail. The inland tracks are deeply rutted; farther out, the tread breaks into loose, sharp volcanic rock and dust. The barren, pockmarked coast is the “Acid War Zone” people come to see, shaped by years of salt spray and surf. Pools and a smaller blowhole appear before the main one.

A lighthouse was built here in 1910, and a keeper lived nearby until the light was automated in 1922. The metal beacon you see today is Coast Guard property and isn’t open for tours. The headland gives wide Pacific views, with Molokaʻi visible across the channel on a clear day.

The route ends at an open, unrailed rocky viewing area. The blowhole’s jet depends on the surf and can shoot above 50 feet; an unexpected wave can also wash over the rocks. Stay well back from the opening, wet rock and cliff edge. For a photo, frame the spray with some of the pitted lava from the set-back viewing area instead of moving closer. There’s a portable restroom at the County lighthouse site, but no water on the route. Maui County permits dogs in its parks on leash; the sharp rock and exposed edge make this a poor fit for a dog that’s unsteady on rough ground.