Kīlauea Iki Trail: Walking Across Fire and Rainforest on the Big Island

The Kīlauea Iki Trail is one of the most mesmerizing hikes in Hawaiʻi Volcanoes National Park, where ancient earth meets living fire. This 4-mile loop plunges hikers into a world shaped by lava and reborn through rainforest. It's a rare trail that lets you trace the footsteps of a volcanic eruption, cross a once-molten lake, and then ascend through native forest teeming with life.

Located on the Big Island within one of the most active volcanic zones on Earth, Kīlauea Iki translates to "Little Kīlauea." But the experience it delivers is anything but small. It all begins at the edge of a vast sunken basin. In 1959, lava exploded 1900 feet into the sky from a vent beneath what is now a solidified crater floor. Today, hikers traverse that hardened lava, walking over ground that once surged with fire.

1. A Trail of Contrasts

This trail is a study in extremes. The route begins in the rainforest, with cool air filtering through ʻōhiʻa trees and ferns. Birds call overhead and the canopy shields you from the early morning sun. Then, without warning, the earth opens. The path descends sharply, roughly 400 to 500 feet down, onto the crater floor. What lies ahead is a stretch of hardened lava, cracked and steaming in places, devoid of shade and pulsing with ancient heat.

• Distance: 4 miles round-trip
• Time: 1.5 to 3 hours depending on your pace and entry point
• Elevation Change: Around 400 to 500 feet
• Difficulty: Moderate, with some uneven terrain and rocky slopes
• Best Time to Hike: Early morning to avoid the heat and crowds

The loop can be completed clockwise or counter-clockwise. Those who start clockwise descend more gradually and enjoy the sun at their back while crossing the crater. This direction is favored by many for its more relaxed ascent near the trail’s end. Going counter-clockwise, however, gives more solitude early in the hike and a steeper climb back to the rim.