The Kilauea Iki Trail is the hike that makes Hawaii Volcanoes National Park click. You start in a dripping rainforest on the crater rim, switchback down about 400 feet through ferns and ohia trees, and then step out onto the floor of a crater that was a churning lava lake in 1959. You walk straight across the hardened lake bed, past the still-steaming vents and the cinder cone that fed the eruption, with crater walls rising on every side. We filmed across this park, and this is the loop we send everyone on first. It is the rare hike where you understand a volcano by walking on it.
Know Before You Go
- Distance: About 3.3 to 4 miles for the full loop combining the Kilauea Iki and Crater Rim Trails.
- Elevation change: Roughly 400 feet down to the crater floor and back up.
- Difficulty: Moderate. The descent and return climb are the work; the crater floor is flat.
- Time needed: 2 to 3 hours at a relaxed pace.
- Trailheads: Kilauea Iki Overlook or the Devastation Trail parking area; both connect to the loop.
- Entrance fee: $30 per vehicle, valid seven days.
- Status: Kilauea is one of the most active volcanoes on Earth and summit eruptions have come and gone repeatedly in recent years. Trails near the summit can close on short notice. Always check the current status with the park before you go.
Why This Crater Matters
In November 1959, Kilauea Iki erupted in spectacular fashion, with lava fountains that reached as high as 1,900 feet, among the tallest ever recorded in Hawaii. The eruption filled the crater with a lake of molten lava. What you walk across today is the cooled and cracked surface of that lake. The cinder cone on the southwest side, Pu’u Pua’i (gushing hill), is the heap of cinder and spatter the fountains built. Steam still rises from cracks where rainwater meets heat below. It is a direct, physical record of an eruption within living memory.
Hiking the Loop
Most people hike the loop clockwise, starting at the Kilauea Iki Overlook. The first stretch follows the forested Crater Rim Trail along the rim, with views down into the crater you are about to cross. Then the trail drops through switchbacks into the rainforest and out onto the crater floor. Crossing the floor is the highlight: cairns mark the route across the cracked black surface, steam vents hiss nearby, and the walls tower overhead. The trail climbs back up the far side through forest to close the loop. Hiking it this direction saves the descent for early and the climb for when you are warmed up.
Combine It With Nahuku (Thurston Lava Tube)
The Nahuku lava tube is a short walk from the same area, and alternate parking for it sits at the Kilauea Iki Overlook, about a half-mile away. Pairing the crater loop with the lava tube makes a satisfying half-day. The tube is a lit, walkable tunnel left behind by flowing lava, an easy add-on for any fitness level.
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Best Time of Day and What to Pack
- Time of day: Morning, before the rainforest clouds build and before the crater floor heats up. The floor offers no shade.
- Rain gear: The rim is rainforest and gets wet often, even when the floor is sunny. Bring a shell.
- Sun protection: The crater floor is exposed black rock that radiates heat. Hat, sunscreen, water.
- Footwear: Sturdy shoes with grip; the lava surface is uneven.
- Water: There is none on the trail. Carry your own.
Honest Caveats
The biggest variable here is the volcano itself. Because Kilauea is so active, summit-area trails including this one can close with little warning during eruptions or hazardous air quality (volcanic smog, called vog, drifts with the wind). Do not assume the trail is open. Check the park’s current conditions page or call before you drive out. Beyond that, the crater floor is genuinely hot and shadeless at midday, the climb back out is steeper than it looks from the rim, and the markers can be easy to lose if clouds drop in, so stay on the cairned route.
Plan the Rest of Your Trip
Kilauea Iki pairs with the park’s headline drives and overlooks. See our guide to the best things to do in Hawaii Volcanoes and time your trip with the best time to visit guide. Start at the Hawaii Volcanoes National Park hub.
