Nowhere else in the United States can you stand at the edge of an active volcano and watch the planet building itself in real time. Hawaii Volcanoes National Park on the Big Island sits atop the Hawaiian hot spot — one of the most geologically productive places on Earth — and it has been continuously reshaping the island’s landscape for millions of years. Kilauea, one of the world’s most active volcanoes, has been erupting in some form for decades. A visit here is genuinely unlike anything else in the national park system.
Kilauea Caldera and the Summit Experience
The park’s main visitor center sits on the rim of Kilauea Caldera, a vast summit depression that has seen eruptions, collapses, and dramatic change throughout recorded history. The 2018 eruption fundamentally altered the caldera’s shape, dropping the floor hundreds of feet and destroying several park facilities — including the beloved Jaggar Museum overlook, which remains closed. The caldera itself has since partially refilled with lava lake activity during subsequent eruptions.
Start at the Kilauea Visitor Center to get current eruption status. Rangers post daily updates on lava activity, which trails are open, and where any visible volcanic activity is occurring. Conditions change quickly — an eruption that’s been dormant for weeks can flare up overnight.
The Crater Rim Drive loops around the caldera and accesses several key viewpoints. Even when lava isn’t actively visible, the steam vents, sulfur banks, and sheer scale of the caldera make this a remarkable drive. At night, if Kilauea is erupting, the glow from the lava lake inside Halemaumau Crater can be visible from the rim — an eerie, unforgettable sight.
Lava Tube Hiking: Thurston Lava Tube
The Thurston Lava Tube — also known by its Hawaiian name Nahuku — is one of the park’s most accessible highlights. Lava tubes form when the outer crust of a lava flow hardens and cools while molten rock continues moving beneath, eventually draining out and leaving a hollow tunnel. Thurston is a large, well-lit tube that you can walk through in about twenty minutes. The surrounding rainforest is lush, and the native birds in the tree canopy overhead are worth slowing down for.
For a more adventurous experience, the park also maintains several undeveloped lava tube caves that you can explore with a headlamp and a sense of adventure. These darker, unmarked tubes give a much rawer sense of what these formations are like. Ask rangers at the visitor center for current access details.
Chain of Craters Road
Chain of Craters Road descends nearly 4,000 feet from the summit caldera to the coast, passing a series of pit craters and lava shield formations along the way. The 19-mile drive ends at the ocean, where older lava flows from Kilauea’s decades of eruptions have poured into the Pacific and hardened into a rugged black bench.
At the end of the road, interpretive signs explain how the lava delta formed, and the Holei Sea Arch — a dramatic natural arch cut by wave action into a young lava flow — is a short walk from the parking area. The contrast between the black lava rock and the blue ocean is visually stunning, and the sound of waves breaking against newly formed coastline carries a particular weight when you realize you’re standing on some of the youngest land on Earth.
Mauna Loa: The World’s Largest Volcano
While Kilauea gets most of the attention, the park also encompasses most of Mauna Loa — the world’s largest active volcano by volume. Mauna Loa’s summit rises to 13,678 feet and last erupted in late 2022, sending lava flows toward the Saddle Road. The Mauna Loa Trail to the summit is a multi-day backcountry route requiring permits and serious preparation. Even the shorter Mauna Loa Road to the trailhead accesses a high, austere landscape quite different from the rest of the park.
The USGS Hawaiian Volcano Observatory provides real-time updates on both Kilauea and Mauna Loa, including webcam feeds of active eruption areas.
All Four Volcano Types in One Park
Geology enthusiasts will appreciate that Hawaii Volcanoes National Park contains examples of all four recognized types of volcanoes: shield volcanoes (Kilauea and Mauna Loa themselves), cinder cones (scattered around the rift zones), spatter cones (low features built from blobs of semi-molten lava), and lava domes (found within the caldera system). Nowhere else on land can you see the full range in one place.
Practical Planning Tips
The park is open 24 hours a day, year-round. Entry fees apply; America the Beautiful passes are accepted. The main visitor facilities are clustered around the Kilauea summit area at about 4,000 feet elevation — temperatures here are noticeably cooler than the coast, and rain is common. Bring a layer and waterproof footwear.
The town of Volcano, just outside the park entrance, has lodging options that put you close enough for early morning or late evening visits — the times when any eruption glow is most visible. Hilo and Kailua-Kona are the main airport and lodging hubs on the island, each about 45–60 minutes from the park. Check the Park Guides section for other Hawaiian destinations, and visit Planning Tips for logistics on island hopping and Big Island itineraries.
FAQ
Is Kilauea currently erupting? Kilauea’s eruption status changes frequently. Check the USGS Hawaiian Volcano Observatory or the NPS park website for current conditions before your visit.
Is it safe to visit if a volcano is erupting? Most eruption activity at Kilauea is confined to the summit caldera and rift zones, which are managed carefully by the NPS. Specific areas may be closed for safety, but the park overall remains open during most eruption events. Follow all ranger guidance and posted closures.
Can I hike on fresh lava flows? Active and recently cooled lava areas have specific access rules that change with eruption status. Some flows are accessible via ranger-led programs; others are off-limits. Never walk onto lava that may be thin-crusted over active tubes — the surface can give way without warning.
What should I wear and bring? Wear closed-toe shoes with good grip on uneven terrain. Bring a rain jacket — the summit area receives significant rainfall. Sulfur dioxide gas is a real concern near active vents; visitors with respiratory conditions should check current vog and SO2 levels before hiking near the caldera.
Is the Jaggar Museum open? The Jaggar Museum building was severely damaged in the 2018 eruption-related collapse and remains closed as of this writing. The Hawaiian Volcano Observatory has relocated its visitor programs; check the park website for current viewing alternatives.