itOpened Guides · Haleakalā National Park
How to actually get a site at Hosmer Grove Campground — the verified facts, the release reality, and the cancellation route in.
Watch it with itOpened
Proof, from our own scanners: 673 confirmed openings across 34 campgrounds since Oct 29, 2026 — each one re-verified before logging. See the live cancellation index.
Watch Hosmer Grove CampgroundFree to start. We never book, hold, or resell — you book it yourself, in your own account, at the normal price. Fees pay for monitoring; openings are first-come and cannot be guaranteed.
Overview Each campsite allows a maximum of one vehicle in designated parking spaces with one additional vehicle allowed in overflow parking. Each campsite has one picnic table and a grill (bring charcoal, no wood collecting permitted). Contained camp stoves are allowed. These campsites are for tents only – Camping trailers or pop-up campers permitted only in allowed parking spaces with reservation, which allows use of campsite picnic table and grill. . The use of hammocks is considered a camping style and will be permitted, but limited to trees more than 10 inches in diameter with adequate padding and within the footprint of the campsite.
| Total sites | 6 |
|---|---|
| Site types | Tent only |
| Site mix (directory count) | Tent only 6 |
| Area | Haleakalā National Park |
| Managed by | National Park Service |
| Nearest community | Makawao, HI |
| Activities | Camping, Historic & Cultural Site, Scenic Drive, Star Gazing, Visitor Center, Wildlife Viewing |
| Directory phone | 808 572-4411 |
| Official listing | Recreation.gov campground page |
| Book through | Recreation.gov |
Hosmer Grove Campground is reserved through Recreation.gov, on the release pattern stated in its official listing. In demand, reservable sites are claimed within minutes of each release — which is why the campground reads as sold out for most of the year, and why the realistic route in is rarely the release itself.
Sites booked months ahead get cancelled as trips fall through, and each cancellation returns its nights to the official calendar instantly — first-come, no waitlist, no announcement. itOpened scans the Recreation.gov calendar for Hosmer Grove Campground around the clock; when a site matching your dates and vehicle opens, you get a text with a direct link, and you book it yourself, in your own account, at the normal price. We never book, hold, or resell. The mechanics are the same ones documented in how campsite cancellations actually work.
Watch more than one calendar. These nearby or same-area campgrounds take the same trip — and their cancellations are independent chances:
| Kipahulu Campground | 21 sites · same area |
|---|---|
| Haleakalā National Park (Wilderness Tent Permit) | 10 sites · same area |
| Haleakalā National Park (Cabin Permits) | 3 sites · same area |
Full directory facts and sibling campgrounds: Hosmer Grove Campground campground page · Haleakalā National Park park page.
Watch it with itOpened
Proof, from our own scanners: 673 confirmed openings across 34 campgrounds since Oct 29, 2026 — each one re-verified before logging. See the live cancellation index.
Watch Hosmer Grove CampgroundFree to start. We never book, hold, or resell — you book it yourself, in your own account, at the normal price. Fees pay for monitoring; openings are first-come and cannot be guaranteed.
Every figure in this article traces to one of the sources above. If a number isn't sourced, we don't print it.
Last updated 2026-10-30.