Mauna Loa Summit Trail

This trail is considered extremely challenging and is recommended only for experienced hikers. It involves significant elevation gain, often over 6,500 feet, and the high altitude means thin air, making it very strenuous. The terrain consists of sharp, uneven, and often loose lava fields, which makes for difficult and slow progress. Acclimatization is highly advised before attempting the full summit.

The trail traverses rugged lava terrain, showcasing breathtaking volcanic landscapes. You'll encounter diverse lava flows, and at higher elevations, the environment is largely barren, creating a 'moon-like' atmosphere with an absence of trees or grass. Sections of the lava rock can be sharp, tough, and loose, requiring careful footing. Oxidized lava rock in various colors can also be seen.

The full hike is approximately 20.7 km (12.9 miles) one-way to the summit and back, with an estimated duration of about 6 hours and 30 minutes for the one-way ascent. However, due to the extreme difficulty, high altitude, and challenging terrain, many hikers plan for multi-day trips, utilizing backcountry cabins to break up the journey and aid acclimatization.

Yes, you must register with Hawaiʻi Volcanoes National Park for safety before embarking on this hike. If you plan to use the backcountry cabins, such as Red Hill Cabin or Mauna Loa Summit Cabin, permits are required for overnight stays. You can find more information on permits and registration on the NPS website.

The primary access point for the Mauna Loa Summit Trail is typically from the Mauna Loa Road, which leads to the Mauna Loa Observatory. Parking is available at the trailhead near the observatory. Always check the Hawaiʻi Volcanoes National Park website for current road conditions and access information.

The best times to attempt this trail are typically spring or fall. These seasons generally offer a balance, helping to avoid the most extreme sun exposure of summer and the potential for heavy snow at the summit during winter. However, weather conditions can change rapidly at any time of year.

You'll experience an otherworldly journey across vast volcanic landscapes. Notable features include diverse lava flows, and the immense scale of the volcano and its caldera, Mokuʻāweoweo. You'll also pass by the Mauna Loa Observatory and can reach the Mauna Loa Summit Crater. There's also a Pit Toilet in Mauna Loa Wilderness for facilities.

Yes, the Mauna Loa Summit Trail is located within Hawaiʻi Volcanoes National Park. As such, standard park regulations apply, including Leave No Trace principles. You must register with the park for safety, and permits are required for overnight stays in backcountry cabins. Always check the official NPS website for the most current regulations, safety alerts, and any entrance fees for the park.

No, due to the extreme difficulty, high altitude, and rugged, sharp lava terrain, this trail is not considered dog-friendly or suitable for families with young children or beginners. It requires significant hiking experience and preparation.

Given the challenging conditions, you should be prepared with warm clothing (layers are essential), ample water (there is no water source on the trail), sufficient food, and a reliable GPS device. Sun protection (hat, sunglasses, sunscreen) is crucial due to intense sun exposure, and sturdy hiking boots are a must for the sharp lava rock. Be prepared for rapidly changing weather, including strong winds and cold temperatures.

Yes, there are backcountry cabins available for overnight stays, such as Red Hill Cabin and Mauna Loa Summit Cabin. These can help break up the arduous hike and aid in acclimatization. However, permits are required for their use. There is also a Pit Toilet in Mauna Loa Wilderness.

Yes, the route primarily follows the Mauna Loa Summit Trail itself, but it also passes through sections of the North Pit Trail, the Observatory Trail, and the Cabin Trail.