Drive a Rental Car to the Summit of Mauna Kea

Mauna Kea is:
• Dormant Volcano: Last erupted 4,600 years ago.
• Tallest Peak in Hawaii: Stands at 13,796 feet above sea level.
• Earth's Highest Mountain: Measured from base to summit
• Chilly Summit: Average annual temperature of 38.1ºF at Mauna Kea Observatory.
• Astronomical Hub: Home to 13 telescopes from 11 different countries.
• Lake Waiau: One of the planet’s highest lakes, located 750 feet below the summit.

Remember to check Mauna Kea road conditions before you depart.

Web Cam:
The Physics & Astronomy department at U of HI, Hilo maintains a group of webcams near the visitor center and Mauna Kea’s summit at 13,750' elevation.

Before you decide to go to the summit of Mauna Kea, plan your trip. A great place to gather information is Onizuka Center for International Astronomy Visitor Information Station on Mauna Kea. Here, you can learn everything you need to know, and then decide if you want to drive the road yourself or join a tour. The road is slow-going and rough. Gasoline is limited. Weather changes unexpectedly and you are likely to encounter icy conditions on the unpaved, precipitous road. Be prepared for a road that closes during ice and snow. This also cancels scheduled tours.

If you plan to drive, there are several important vehicle issues you should consider. None of our major rental car partners allows their vehicles, Jeeps included, beyond the visitors center.

There are important considerations for each person in your vehicle who will travel to the summit of Mauna Kea. Did everyone pack warm clothes and footwear for the always-cold temps of the summit? If you’ll be on the summit after sunset, be ready for freezing temps. To prevent dehydration, everyone in the vehicle should drink plenty of water throughout the trip. Everyone should be wearing fresh sunscreen and quality sunglasses to protect from UV radiation at the summit.

Are you prepared for altitude sickness? To acclimate to Mauna Kea’s thin air (40% less oxygen than at sea level) it is important to stop at the visitor’s center for at least 20 minutes before heading on to the summit. Each passenger in your car may be at danger, for different reasons, from the extreme altitude. These include children under the age of 16, pregnant passengers, folks with heart and/or respiratory issues, anyone who smokes, has eaten gassy foods (yes, really), enjoys large amounts of caffeine, or has been scuba diving during the previous 24 hours.

If you are unable to rent a car, we believe that the best way to see Mauna Kea is to join a tour and leave the driving to experienced guides. Or, you could just watch the video of the Drive Up Mauna Kea. Options for tours include visits to observatories, summit walks, early morning sunrise tours and nighttime stargazing. These permitted companies will pick you up, provide warm clothes, and many offer food and beverages. The “original” and the most luxurious tour company is Mauna Kea Summit Adventures. Mauna Kea is an amazing educational wonder. We suggest that you pick the tour company that offers you the best adventure for your interests.

Read others Mauna Kea Summit Road reviews online and refer to our Mauna Kea Rental Car Map for more information. One person describes How NOT to visit Mauna Kea Summit. Visit the University of Hawaii Institute for Astronomy website to discover more about the different Telescopes.

If you decide to make the trek in a rental car, please call (808) 935-6268 (recording) for current weather conditions.