Can you drive to Mauna Loa Observatory?

Okay, picture this: you're on the Big Island of Hawai’i, ready for an adventure up the slopes of Mauna Loa, a massive active volcano. The road you're about to tackle? Mauna Loa Scenic Drive, also known as Mauna Loa Observatory Road. It’s about 17 miles of narrow, paved road carving its way through a seriously otherworldly lunar landscape made of solidified lava.

"Mauna Loa" means "Long Mountain" in Hawaiian, and this road lives up to the name! Built in the 1950s, it climbs from around 6,500 feet to over 11,000 feet, all the way to the Mauna Loa Observatory, a super important research facility studying climate change.

The road is steep, gaining over 4,600 feet in elevation – that's an average gradient of almost 5%. A 2WD vehicle can handle it, but be ready for some rough patches and potholes, especially at the beginning. Keep an eye out for that thin white "fog line" down the middle – it's your guide when the clouds roll in. The pavement can be barely wider than a car, and the shoulder is basically jagged lava rock, so straddle that line whenever you can to protect your tires.

This road can be hazardous, with blind hills and turns. Go slow, be careful around corners, and fill up your gas tank before you go – there are no services at the top!

The views are worth it, though! On a clear day, you’ll see Mauna Kea, Kohala, Haleakala (on Maui!), Hualalai, and the saddle at Pohakuloa. You might even spot other islands!

But a word of caution: weather changes fast up here. If fog or clouds start to roll in, bail immediately! This road is NOT where you want to be in low visibility. Winter can bring blizzards, high winds, and whiteouts – snow is possible any time of year. High-altitude storms can pop up without warning. And remember, Mauna Loa is an active volcano, with the most recent eruption occurring in 1984. Volcanic eruptions are possible at any time. Be smart, be prepared, and enjoy the ride!