Nāulu Trail

Why hike it

Looking for solitude and lava-in-your-boot-prints kind of scenery? The Nāulu Trail strings together a rugged coastline overlook, vast lava fields, a cool burst of native cloud forest, and a dramatic finish at Makaopuhi Crater. It’s a moderately challenging, less-traveled route that rewards careful footing with big geology and a rare mix of Hawaiian ecosystems.

This is about 6.6 miles TOTAL, out-and-back. Expect slow going on rough ʻaʻā and pāhoehoe—the challenge comes from sharp, uneven lava more than steep climbs. Ahu (stone cairns) guide you across the flows, then the trail slips into shady, ferny forest with native plants and songbirds before arriving at a viewpoint roughly 300 feet above the crater floor. It’s a great swap for crowds and boardwalks: raw, quiet, and visually striking.

Best time to hike

Year-round works, but start early. The lava sections are fully exposed and can cook by midday, especially in warmer months. Cooler, drier months tend to feel best, and the forested stretch often sees rain—pack a light shell. Morning light is kinder for photos on the open flows and keeps temps in check.

Know before you go

• Footing is everything here. Sturdy shoes are a must on sharp, sometimes unstable lava. Long pants help if you take a tumble.
• Navigation depends on spotting ahu across open flows—pay attention at each junction and in wide lava fields.
• Bring plenty of water and snacks; there are no facilities. Sun protection is non-negotiable.
• Common hazards include earth cracks, sharp glassy lava, and slick mud in forested sections. Take your time.
• If you have extra gas in the tank, some hikers use Nāulu as part of a longer linkup toward Nāpau Crater—budget significantly more time if you consider this.

Trailhead & parking

Begin at the Kealakomo parking area, about 9.7 miles down Chain of Craters Road. You’ll kick off with coastal views before heading inland across the lava.