Crater Rim Trail

Crater Rim Trail follows the edge of Kīlauea's summit caldera. Its full corridor has several access points and no single standard distance, so compare hikes by their start and turnaround. This is the 3.8-mile out-and-back from Kīlauea Overlook parking to Volcano House, about 1.9 miles each way. Allow around two hours with a few pauses. It's a good choice when you want a substantial caldera walk with steam and forest, without turning it into a long summit traverse. Follow this section to Volcano House, then return the way you came; it doesn't loop around the caldera.

Start at Kīlauea Overlook parking and head east. The path begins paved and runs over open ground, then changes among fine gravel and dirt before rougher stone near Volcano House. The grade is manageable, but the changing surface can be uneven underfoot. The trail crosses other named route junctions around the summit, so follow Crater Rim signs rather than taking a spur by accident. As the path opens toward the bluff, look out across the caldera and pause where steam rises beside the trail.

At Wahinekapu (Steaming Bluff), the steam is groundwater, not lava: rain seeps into cracks, reaches rocks heated by magma, vaporizes, then returns to the surface. Nearby Haʻakulamanu (Sulphur Banks) is different; deeper fractures can release sulfur dioxide and hydrogen sulfide along with steam. Don't assume the two stops have the same gases or experience. The railings at Wahinekapu make a strong photo foreground: frame the path so the steam is visibly coming from the ground beside it.

The larger Crater Rim corridor has access points at Uēkahuna, Kīlauea Overlook, Steam Vents and Volcano House, so a hike's mileage depends on where you start and stop. The 2018 summit collapse and later eruptions dramatically altered the caldera rim and damaged parts of the former road and trail. Older hike reports describe different start points and mileages. This mapped walk is one connected north-rim section; it isn't a full ring around Kīlauea caldera.

Bring food and water, and be ready for sun, wind or rain; conditions at the summit can swing from hot and dry to wet and windy in a short time. Stay on the marked trail and well back from cliff edges, ground cracks and steam-vent margins: the footing can be unstable and slippery. Pets aren't allowed on park trails. If you only want to see the steam, the short gravel path from Steam Vents parking to Wahinekapu is a separate 0.1-mile visit and can be traversed by wheelchair; it isn't a shortened version of this out-and-back.