Visiting the summit of Mauna Kea was one of the highlights of our trip and absolutely worth the effort. The views are incredible, and the landscape changes so dramatically as you climb that it genuinely feels like you're driving across another planet. Watching the sunset from above the clouds was unforgettable—it really feels like you're standing on top of the world.
A few things I'd recommend knowing before you go:
- A 4WD vehicle is required for the summit road. We went in a friend's dual-motor Tesla, and it handled the drive very well. A more rugged vehicle would have probably handled the gravel/washboardy road sections a bit better but we made it 😁) Regenerative braking took most of the load on the way down. Rangers were checking brake temperatures at the bottom of the descent, and ours measured about 70°F, while they mentioned that some vehicles were coming down with brakes over 700°F. They were making some people wait and cool off their cars at the visitor center before continuing down the mountain.
- It is definitely cold and windy at the summit, even in the summer. A warm jacket is a must, and a hat isn't a bad idea either.
- The altitude is no joke. Even if you normally hike or exercise without difficulty, take it easy when you arrive. I recommend extra time at both the visitor center and the summit to acclimate before sunset.
- There are portable restrooms at the summit, which was helpful since I wasn't sure from reading other reviews whether any facilities were available.
- They do ask you to leave the summit shortly after sunset. We were able to stay long enough to see the telescopes housing open up and start moving a bit. However, on the drive back down, there are two small parking areas roughly a third of the way back to the visitor center. We stopped there for stargazing and had spectacular views of the night sky. I didn't check the exact elevation, but it was likely still around 12,000 feet, and the stars were absolutely amazing.
Overall, this was one of the most memorable experiences we have ever had. If you have the right vehicle, dress warmly, respect the altitude, and take your time, I highly recommend making the trip to the summit.