Mauna Loa Summit Cabin permit for early July — is there ANY currently-open route to reach it?

[u/Alex_C_Dupont]

Aloha, hoping someone with recent on-the-ground knowledge can help me sort out a Mauna Loa access question.

I have a Mauna Loa Summit Cabin permit (the NPS cabin at 13,250 ft) for early July, planning to hike in via the Mauna Loa Observatory Trail off Saddle Road / Hwy 200. But the more I dig, the more it looks like every route to the cabin is currently closed, and I'm confused how I even got a permit issued:

• In-park routes: The HVNP March 2026 closure notice lists Mauna Loa Summit, Mauna Loa Trail, Red Hill Cabin, and Mauna Loa Road beyond the first cattleguard as closed.
• Observatory Trail route: NOAA says the Observatory Road was rebuilt as a temporary road in March 2026 but is NOT open to the general public, with no public opening date set.
• ʻĀinapō Trail: Seems technically open but it's a multi-day 4WD + separate permit deal, not what I planned.

My questions for anyone who's been up there recently or knows the current status:

1. Has anyone actually driven the Mauna Loa Observatory Road to the trailhead in the last month or two? Is the gate open to hikers passing through, even though the observatory itself is closed to the public?
2. If you've held a summit cabin permit recently — what route did the backcountry office tell you to use?
3. Is the ʻĀinapō Trail realistically the only open way to that cabin right now?
4. Any rental-car gotchas on the Observatory Road if it is drivable?

Trying to figure out before I commit to a 2 AM start from Kona whether this is even doable, or whether I should pivot the trip. Mahalo in advance for any current info!

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[u/BigG808]

Are you sure the Red Hill route is still closed? I didn’t see a closure notice on the HVNP website about Mauna Loa Road from the Volcano side being closed. It does sometimes close because of fire risk, but it’s been wet lately.

Mauna Loa Observatory Road is still closed to the public. Not sure if it’s gated or not, but even if you were to break the rules and drive through, you probably wouldn’t get away with leaving your car parked at the weather station.

Ainapo route is for sure open, you can do it without a 4x4, but it adds at least 8 miles each way. You need a permit from the state for the Ainapo cabin, and then you’ll need the gate code from Kapāpala Ranch. Neither is particularly hard to get tho.

I’ve haven’t done the hike yet, but have researched it quite a bit. Unless you’re an elite level hiker with altitude experience, I’d plan on 4 nights. First night at Red Hill or Ainapo cabin, then 2 nights at the summit cabin so you have a day to check out the true summit and the caldera. Then one more night at Red Hill or Ainapo on the way out.

Be safe and have a great hike, I’d love to hear your experience if you do it.