Volcanoes & Views: Hiking Hawaii’s Most Thrilling Trails

The Kīlauea Iki Trail drops 400 feet through rainforest into a crater that held a molten lava lake in 1959 — today you walk across its cracked, steaming crust. That four-mile loop is one of the most accessible ways to experience volcanic terrain in Hawaiʻi Volcanoes National Park, which protects two active volcanoes across more than 335,000 acres on the Big Island.

This guide covers the most thrilling trails across four islands — from volcanic craters and ridgeline lookouts to coastal cliffs and bamboo forests — with the practical details you need to plan each hike safely. Whether you’re after a short family-friendly walk or a full-day challenge, these are the routes worth building your trip around.

Kīlauea Iki Trail — Big Island

Not all volcano hikes require staring into a crater from above. The Kīlauea Iki Trail drops you onto the crater floor itself — a hardened crust that was liquid rock during the 1959 eruption. Steam still rises from cracks in the surface, and the surrounding rainforest feels like it’s slowly reclaiming the scene. The full loop runs about four miles with 400 feet of descent and ascent, taking most people two to three hours. Follow the ahu (rock cairns) across the open crater floor to stay on course.

Park at the Kīlauea Iki Overlook lot — it’s less crowded than the Nāhuku lot and puts you right on the trailhead. From there, you can also connect to the short, paved Devastation Trail, a half-mile loop through the cinder field left by the same eruption, where skeletal ʻōhiʻa trees stand in black sand and ferns are slowly pushing back in. Both trails sit inside Hawaiʻi Volcanoes National Park, which charges a $30 per vehicle entrance fee valid for seven days. The Kīlauea Visitor Center is closed for renovation as of 2026; pick up maps and Junior Ranger books at the Welcome Center at Kīlauea Military Camp, open daily 9:00 a.m. to 4:45 p.m.

Sliding Sands Trail — Maui

What does it feel like to hike into a volcano? The Sliding Sands Trail (Keoneheʻeheʻe) starts at the 10,023-foot summit of Haleakalā and descends into the vast crater below, passing red and black cinder cones and the rare silversword plant that grows nowhere else on earth. The full trail runs 11.2 miles one way with roughly 2,800 feet of elevation change, but a manageable day hike is to go two to three miles down, explore the crater floor, then climb back out. The return is the harder part — save energy for it.

Summit temperatures sit around 30–40°F at sunrise, often with strong wind. If you want to catch the famous sunrise from the rim, you need an advance timed-entry reservation through Recreation.gov ($1 per person) for the 3:00–7:00 a.m. window. Without a sunrise reservation you can still enter the park later in the day for the standard $30 per vehicle fee (valid for three days). The Haleakalā National Park website posts current trail conditions and weather advisories.

Diamond Head Summit Trail — Oahu

Five dollars per person and an advance reservation — that’s what it takes to hike Oahu’s most iconic volcanic crater. The Diamond Head Summit Trail (Lēʻahi) is a 1.6-mile round trip that climbs 560 feet through a historic WWII military tunnel system, past bunkers and spiral staircases, to a 360-degree observation deck with views from Waikīkī to Koko Head to Pearl Harbor. The trail is rated easy to moderate, but the stairs and tunnel sections make it feel more substantial than the distance suggests.

Reservations are required and must be booked at GoStateParks.hawaii.gov. Parking inside the crater is limited, so arriving before 7:00 a.m. gives you the best chance at a spot and cooler temperatures on the climb. The trail is paved the whole way, but closed-toe shoes are still recommended — the tunnel floors can be uneven and damp.

Kalalau Trail — Kauai

The Nā Pali Coast rises 4,000 feet straight from the Pacific, and the Kalalau Trail traces its edge for 11 miles one way through cliff faces, sea caves, and valley streams. It’s widely considered one of the most challenging and dramatic hikes in the United States. The full 22-mile round trip requires an overnight camping permit issued through a lottery system that sells out months in advance. But the first two miles to Hanakāpīʻai Beach are accessible with a day-use reservation from the Hāʻena State Park reservation system — no camping permit needed for that section.

From Hanakāpīʻai, a two-mile inland spur leads to Hanakāpīʻai Falls, adding another four miles round trip. The trail is narrow and exposed in places, and sections become dangerous when wet. Check trail conditions on the DLNR Trail Conditions page before you go. Permits for the full Kalalau Trail are issued through the same DLNR system and require planning well ahead — most hikers book their lottery slots three to six months in advance.

Pipiwai Trail — Maui

You’ll hear the bamboo before you see it. The Pipiwai Trail starts in the Kīpahulu section of Haleakalā National Park, near the town of Hana, and climbs four miles round trip through a towering bamboo forest that clicks and creaks in the wind. The trail ends at Waimoku Falls, a 400-foot cascade that drops straight down a cliff face into a pool below. It’s a moderate hike with about 650 feet of elevation gain, and the trail can get muddy — shoes with good traction make a real difference here.

Entry is covered by the same $30 per vehicle Haleakalā National Park fee, valid for three days and accepted at both the summit and Kīpahulu entrances. The Kīpahulu Visitor Center page posts current trail conditions and parking availability. Parking at the trailhead fills by late morning, so an early start from Hana (about 15 minutes east) is the best plan.

Permits, Safety, and Timing — What You Actually Need to Know

The single most important thing to check before any Hawaii hike is the reservation requirement. Diamond Head, Haleakalā sunrise entry, and Hāʻena State Park (Kalalau trailhead) all require advance bookings — walk-ups are not an option. For trails that don’t require reservations, the main bottleneck is parking. Lots at Kīlauea Iki, Nāhuku, and Pipiwai fill by 9:00 a.m. on most days, and Diamond Head’s crater lot is even tighter.

Start early. Morning hours — roughly 6:00 a.m. to 10:00 a.m. — offer the clearest views before afternoon clouds and trade winds roll in. This is especially true for summit and ridgeline hikes where visibility drops fast after noon. Bring at least one liter of water per hour of hiking; humidity and UV exposure in Hawaii deplete your reserves faster than you’d expect at the same elevation on the mainland.

Closed-toe shoes are required on virtually every trail in Hawaii. Sandals are inadequate on rocky or muddy terrain, and lava rock is sharp enough to cut through thin soles. A light rain jacket is useful year-round, and a warm layer is essential at Haleakalā summit and for any evening hike near Kīlauea’s glow after dark. A headlamp is useful for night viewing at the volcano and for the dark sections of Nāhuku lava tube.

Before You Go — Hiking Hawaii’s Volcanoes and Views

Which trails require advance reservations?

Diamond Head Summit Trail requires a reservation at GoStateParks.hawaii.gov ($5 per person). Haleakalā sunrise entry (3:00–7:00 a.m.) needs a timed ticket through Recreation.gov ($1 per person). The Kalalau Trail day-use section requires a Hāʻena State Park reservation; the full trail requires an overnight permit lottery.

Are volcano hikes safe for kids?

Yes, with the right trail choice. The paved Devastation Trail and the short Steam Vents walk are stroller-friendly and take five to ten minutes each. Nāhuku lava tube is lit and easy. Kīlauea Iki Trail is manageable for older kids comfortable with a 400-foot descent and two to three hours on their feet. Haleakalā summit trails are colder and more exposed — better suited to teens and adults.

What should I pack that I might not think of?

A headlamp or small flashlight — useful for the dark sections of Nāhuku lava tube and for viewing Kīlauea’s glow after dark. A warm layer, even in summer: the summit of Haleakalā sits above 10,000 feet and can drop to 40°F with wind. Reef-safe sunscreen and a hat matter even on overcast days at elevation.

When is the best time of year for these hikes?

Summer (June–September) is driest and busiest. Winter (November–March) brings more rain and cooler temperatures at elevation, especially at Haleakalā and Hawaiʻi Volcanoes National Park. Spring and fall offer a good balance of drier weather and thinner crowds. The eruption at Kīlauea is episodic year-round — check USGS updates within 24 hours of your visit regardless of season.

One Last Thing

The trails here don’t just cross volcanic landscapes — they cross ground that’s considered sacred in Hawaiian tradition. Pele lives in Halemaʻumaʻu crater, and the lava rock under your feet has cultural weight. Don’t take rocks or sand; rangers receive packages every year from visitors who mailed them back. Leave the place as you found it, and the views will be waiting when you come back. If you’re planning a longer trip, our guide to island hopping in Hawaii can help you decide which islands deserve the most trail time.

References

National Park Service. “Hawaiʻi Volcanoes National Park — Plan Your Visit.” 2026. ↗

National Park Service. “Haleakalā National Park — Kīpahulu Area.” 2026. ↗

Hawaiʻi State Parks. “DLNR Trail Conditions and Closures.” 2026. ↗

Recreation.gov. “Haleakalā National Park Sunrise Reservation.” 2026. ↗

If you’re looking for more ways to experience Hawaii beyond the trail, our guide to hidden waterfalls and swimming holes pairs well with the hikes above, and the best spots for snorkeling with sea turtles makes a solid rest-day activity between long walks.