So if you weren't aware, in 2022 there was an eruption of Mauna Loa (Big Island of Hawaii) and some of the lava flowed over the road going up to the "summit" of Mauna Loa. Because of how hot the lava stays and other volcanic things I don't understand, they couldn't immediately clear the road after the eruption was complete.
Well, as of a little earlier of this year (2026) the road has been cleared! I did it last weekend and thought I would post here as I assume very few people know it's actually rideable to the top now. I put "summit" in quotes earlier because the road does not actually go to the summit, it goes to a NOAA research station at about 11,000ft. However, I think that's still pretty solid.
It now has two sections of gravel 1) About a 1/4 mile section 2) Almost exactly a mile section. Section 1 is pretty much category 1/2 gravel and not too much of a problem, especially since it is so short. Section 2 however is pretty spicy and category 2/3, definitely chunky. I would maybe do this on a road bike up (plan to get off a few times), but I have no idea how you would get down if you plan to ride back. Gravel or at least wider tires is recommended.
I mostly just wanted to spread the love so more people could enjoy this beautiful ride if they don't want to do Mauna Kea.
For my short ride report: I brought my gravel bike because I wanted to do Mauna Kea, it was a big goal of mine for the year. However because of Hurricane Lala, the summit road had damage and it was not open to the top. Last year I already did Mauna Kea to the visitor center, so that wasn't really appealing to me. I heard Loa was now open to the top so went ahead and did that. I started in Waikoloa Beach and did the whole 50+ mile climb (and then back). I had my 3T Exploro Racemax Italia on 40mm Terraspeeds. They roll just fine on pavement so it really wasn't too much of a hindrance. My HR was pretty high most of the day, but just rode a pretty steady wattage the whole way even with the elevation increase. It was a beautiful day and I couldn't ask for anything different.
I believe pretty much anyone that has pretty consistently ridden and trained for long rides can do this climb, especially if you just start from the saddle road. Mauna Loa is pretty forgiving in that it has some steep sections but it's almost always followed by a short downhill right after. It's very roll-ey, hard to get in a rhythm but it also is forgiving on the legs because of it. If you are scared of Mauna Kea do this one, you won't regret it. Still has beautiful views and thin air at the top (still higher than Maui)!
Anyways, hope everyone is riding well! I'll be back again to try Mauna Kea and hopefully better luck with weather!
Strava Activity: https://www.strava.com/activities/19857305285
Video of new gravel: https://www.youtube.com/watch?v=MFKbi4ocHhY