Parking
Start at the Nāhuku (Thurston Lava Tube) parking area. Finish at Chain of Craters Road near the Mauna Ulu parking area; arrange a pickup or plan to walk back.

Hawaiʻi Volcanoes National Park, HI
A gentle forest descent from Nāhuku toward Mauna Ulu.
Overview
Map & elevation
Plan your hike

The highest, rockiest slopes around here are a summer buffet for grizzly bears.
Hawaiʻi Volcanoes Tour Guide
Parkwolf is a GPS audio tour guide for Hawaiʻi Volcanoes National Park. As you drive, it chimes in with what’s ahead: hidden gems, upcoming stops, history, geology, and wildlife, right through your car’s speakers.
See the Hawaiʻi Volcanoes audio tourRecorded for this trailhead
Nāhuku: Inside a Lava Flow“Nāhuku Lava Tube is coming up, with a rainforest walk into a tunnel left by flowing lava. I'd do this one if you've never been inside a lava tube. Allow about half an hour for the short loop from its own parking area.”
Plays as you drive up to this trailhead in the Parkwolf Hawaiʻi Volcanoes Tour Guide.
More stories near here in the app
Trail guide
Escape Road is a 3.8-mile, one-way walk from Nāhuku’s parking area to Chain of Craters Road near Mauna Ulu. From the lot, follow Crater Rim Trail south to the Escape Road branch, then descend on the unpaved, cinder-surfaced doubletrack. Expect about two hours and roughly 735 feet of descent. The distance includes the short connector from the parking area, not the separate Highway 11 section north of Nāhuku.
Most of the walk is a gentle road descent through tall tree ferns, dense undergrowth and grassy patches. It crosses a 1973 lava flow before reaching Chain of Craters Road. Escape Road is an emergency access route that park sources also identify as a route for hikers, cyclists and equestrians. Expect a long forest crossing rather than a loop or narrow singletrack.
This is point-to-point: arrange a pickup near the Mauna Ulu parking area or walk back the way you came for about 7.6 miles total. Dogs and other pets are prohibited on park trails, including frontcountry and backcountry routes. The separate Mauna Ulu Eruption Trail is near the finish but is not part of this route.
Wildlife
600 sightingsHawaiian Goose (Nēnē)Most seen around 5 PMSighting map
35 sightingsGreen Sea TurtleMost seen around 11 AMSighting map
36 sightingsHawaiian Hawk ('Io)Most seen around 11 AMSighting map
41 sightingsBlack NoddyMost seen around 5 PMSighting map
96 sightingsWhite-tailed TropicbirdMost seen around noonSighting map
24 sightingsHawai'i 'ElepaioMost seen around 8 AMSighting mapSighting maps show where each species has been reported across Hawaiʻi Volcanoes. Wildlife moves, so no sighting is guaranteed.
Keep exploring
EasyNāhuku (Thurston Lava Tube) Trail0.4 mi · 30 min · At the trailheadA short ferny walk leads into a 500-year-old lava tube.
ModerateKīlauea Iki Trail3.3 mi · 2.5 hr · 0.3 mi awayCross a solidified lava lake beneath Puʻupuaʻi
EasyKeanakākoʻi Crater Trail2 mi · 1.3 hr · 1 mi awayAn easy walk on a former road reaches a 115-foot crater.
ModerateUēaloha (Byron Ledge) Trail2.2 mi · 1.5 hr · 1 mi awayOpen cinder, forested ledge, and views of Puʻupuaʻi.
EasyDevastation Trail1 mi · 1 hr · 1.1 mi awayA short paved walk through cinder from Kīlauea Iki’s 1959 eruption.
EasyKūpinaʻi Pali (Waldron Ledge) Trail1.2 mi · 54 min · 1.7 mi awayA short paved route to a broad caldera view
ModerateHalemaʻumaʻu Trail1.6 mi · 1.5 hr · 1.8 mi awayA short rainforest descent opens onto Kīlauea’s caldera floor.
EasyHaʻakulamanu (Sulphur Banks) Trail1.2 mi · 36 min · 2.2 mi awayA short boardwalk walk past yellow sulfur and rising steam.
Sight · 0.1 mi awayNāhuku Lava TubeA rainforest walk opens into a lava tunnel.
Sight · 0.3 mi awayKīlauea Iki OverlookA quick rim stop above the crater of 1959's towering lava fountains.
Sight · 0.8 mi awayPuʻupuaʻi OverlookSee Kīlauea Iki from beside the cone its eruption built.
Ranger station · 1.3 mi awayBackcountry Permit OfficeThe stop for backcountry permits and a ranger safety briefing.
Sight · 1.3 mi awayKūpinaʻi Pali (Waldron Ledge)A broad Kaluapele view along the cracked, abandoned Crater Rim road.
Sight · 1.4 mi awayLuamanu and July 1974 FlowA crater holds the mark of lava that later drained away.
Entrance station · 1.5 mi awayHawaiʻi Volcanoes National Park Entrance StationSave your pass offline; reception is limited at the entrance.
Sight · 1.6 mi awayPuhimau CraterA quick roadside look into one of Kīlauea's steep-walled pit craters.Parkwolf’s Hawaiʻi Volcanoes ranking