Mauna Loa

The Basics

Set within Hawaii Volcanoes National Park, Mauna Loa’s unfurling flanks make up half the landmass of the Island of Hawaii, and its 13,679-foot (4169-meter) peak is high enough to catch the occasional snow. Most visitors to Mauna Loa explore the volcano on a scenic drive—you can also book a guided tour to enjoy the views without worrying about driving. If you want to explore on foot, opt for guided treks ranging from day hikes to multi-day backpacking trips. To get a scope of the true size of the volcano, take a helicopter flight above Hawaii Volcanoes National Park.

Things to Know Before You Go

• It can be cold and windy on the mountain, so bring warm layers and a windbreaker if you plan to get out of your vehicle.

• Multi-day hikes require permits and spots are limited, so contact the National Park Service before planning a backcountry trip.

• Some areas (such as the Mauna Loa Lookout) have wheelchair- and stroller-accessible walkways and vault toilets.

• Volcanic rock makes sturdy shoes a necessity if you want to hike the trails.

How to Get There

Mauna Loa is located an hour’s drive from Hilo, within the Hawaii Volcano National Park. A popular choice for viewing the park is to drive Saddle Road, which cuts between Mauna Loa and Mauna Kea. To explore the upper reaches of Mauna Loa, turn off Saddle Road onto Mauna Loa Observatory Road and follow it to the Mauna Loa NOAA Atmospheric Observatory, which sits just below the summit at 11,140 feet (3395 meters).

When to Get There

While the mountain is a popular destination year-round, plan your trip in the spring or fall to avoid the worst crowds. You can also visit in the late evening or even after dark for stargazing. Trail closures are common in the park, so check the Hawaii Volcanoes National Park website before planning a hike.

Hiking to the Summit of Mauna Loa

The summit of Mauna Loa can only be reached on foot and is accessible by two backpacking routes. Both are considered strenuous due to rugged terrain and high altitude. You can choose a challenging day hike that begins at the Mauna Loa Observatory or a trek of more than 30 miles (48 kilometers). The route includes cabins where hikers can stay along the way.

Ways to explore

Set within Hawaii Volcanoes National Park, Mauna Loa’s unfurling flanks make up half the landmass of the Island of Hawaii, and its 13,679-foot (4,169-meter) peak is high enough to catch the occasional snow. Most visitors to Mauna Loa explore via scenic drive and stop at the lookout. Guided tours, though, allow you to enjoy the views without worrying about driving.

If you want to explore on foot, opt for guided treks ranging from day hikes to multi-day backpacking trips (permit required). To get a scope of the volcano’s massive size, take a helicopter flight above the national park.

Accessibility

Not recommended for travelers with mobility limitations—it’s extreme terrain at high altitudes.

Age limits

Technically none, though hikers should be experienced

What to pack

Activity-dependent, though always bring water, snacks, and a first-aid kit

What to wear

Activity-dependent, though all visitors will want layers

Not allowed

Fires, dogs, littering

Amenities

Scenic lookout, composting toilets at shelter cabins only

Address

As the world's largest active volcano, there are multiple access routes to Mauna Loa, but current road conditions significantly impact access. Check for updates before your visit.

Driving

Take Highway 11 to the Kilauea Visitor Center, then take Mauna Loa Road for about 20 minutes to the Mauna Loa Lookout, which is open during construction.

Public transportation

Public transportation isn’t available to the volcano—you’ll need a taxi or rideshare.

Best times to visit

Early morning starts are essential (before 6:30am) for day hikes to avoid afternoon weather.

Best days to visit

Clear weather days are a must—don’t attempt hiking around Mauna Loa in fog, clouds, or in poor visibility.

Best months to visit

March through September is the most popular time for hiking, though it’s a year-round destination.