Openings · last 7 days
39
Booking reality
Campsite Sniper detected 39 site openings here in the last 7 days
01 · Detected Opening History · the openings record · file CS-10068557
When Hosmer Grove Campground reopens
Hosmer Grove Campground's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
103
Openings · last 90 days
113
Weekday pattern
Detected openings by day of week · 90dNo strong weekday pattern is evident in the openings Campsite Sniper has detected: 113 openings spread across the week.
Hour-of-day pattern
First detected by hour · local time · last 90 daysThe largest concentrations of detected openings were first detected during the 06:00 and 07:00 local-time hours. Those hours contained 31 of 113 detected openings (27.4%). Hours show when Campsite Sniper first detected each opening, in Hawaii-Aleutian Standard Time, not when the change was made upstream.
Lead-time profile
Days before stay date · percentilesHalf of the openings Campsite Sniper detected appeared at least 29 days before the stay date; the middle 50% land 29–30 days out. Set an alert if you want Campsite Sniper to monitor future openings.
Highest-churn sites
Most openings · 90d| Site | Openings | Share of all openings |
|---|---|---|
| 4 | 24 | 21.2% |
| 2 | 21 | 18.6% |
| 3 | 20 | 17.7% |
| 5 | 19 | 16.8% |
| 6 | 18 | 15.9% |
Site 4 had the most detected openings in the last 90 days: 24. One free watch covers every site here.
02 · Availability Outlook · Sep 18, 2026 – Mar 19, 2027 · of 6 monitored sites
Of the 1,098 tracked site-nights (Sep 18, 2026 – Mar 19, 2027): 74 open for online reservation · 112 reserved · 6 closed · 906 not yet released.
Where the open windows are
93.3% of tracked site-nights are not currently open for online reservation. 74 of 1,098 remain open; here is where they are.
Load status
Sep 18, 2026 – Mar 19, 2027Not open online93.3%
Open site-nights74 / 1,098
Reserved (of online inventory)112 / 186
Weekday openings47
Weekend openings27
Of the open site-nights on mapped sites, 47 fall on weekdays and 27 on weekends (Fri–Sun).
Open dates by month
Sep 2026 – Mar 2027November shows no online availability. 0 of 180 tracked site-nights are open there — 180 not yet released.
Holiday windows
Sites open per night · of 6 sites| Window | Night | Sites open | Status |
|---|---|---|---|
| Labor Day | SAT Sep 5 | 0 | None open |
| SUN Sep 6 | 0 | None open | |
| MON Sep 7 | 0 | None open | |
| Thanksgiving | THU Nov 26 | 0 | None open |
| FRI Nov 27 | 0 | None open | |
| SAT Nov 28 | 0 | None open | |
| Christmas | THU Dec 24 | 0 | None open |
| FRI Dec 25 | 0 | None open | |
| New Year | THU Dec 31 | 0 | None open |
| FRI Jan 1 | 0 | None open |
Labor Day: no online availability on any tracked night. Thanksgiving: no online availability on any tracked night. Christmas: no online availability on any tracked night. New Year: no online availability on any tracked night.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| 4 | 16 |
| 5 | 13 |
| 3 | 12 |
| 1 | 11 |
| 2 | 11 |
The 5 sites with the most open site-nights in the current snapshot. Pair a bookable date with a free alert to cover everything else.
Next windows
As of Sep 18, 2026 snapshotNext open dateSun · Sep 20
Next open weekendFri · Sep 25
November0 of 180 · not yet released
The next bookable night is Sep 20; the first open weekend starts Sep 25. Campsite Sniper can watch later dates for you.
Stays and site detail
74 open site-nights across 6 sites at Hosmer Grove Campground, from the same hourly snapshot as everything above.
Multi-night stays. 19 2-night, 11 3-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 20 at site 5.
All 6 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 4 | Not recorded | None | 16 | 4 nights | Sep 22, Sep 23, Sep 24, Sep 25, Sep 30, Oct 1, Oct 2, Oct 6, Oct 9, Oct 11, Oct 12, Oct 13 +4 more |
| 5 | Not recorded | None | 13 | 3 nights | Sep 20, Sep 21, Sep 22, Sep 27, Sep 28, Sep 29, Oct 1, Oct 11, Oct 12, Oct 13, Oct 16, Oct 18 +1 more |
| 3 | Not recorded | None | 12 | 4 nights | Sep 22, Sep 24, Sep 25, Sep 29, Oct 1, Oct 8, Oct 11, Oct 12, Oct 16, Oct 17, Oct 18, Oct 19 |
| 1 | Not recorded | None | 11 | 5 nights | Sep 21, Sep 22, Sep 27, Oct 6, Oct 12, Oct 13, Oct 15, Oct 16, Oct 17, Oct 18, Oct 19 |
| 2 | Not recorded | None | 11 | 3 nights | Sep 22, Sep 24, Sep 29, Oct 1, Oct 2, Oct 8, Oct 12, Oct 13, Oct 17, Oct 18, Oct 19 |
| 6 | Not recorded | None | 11 | 5 nights | Sep 22, Sep 24, Sep 27, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 15, Oct 16, Oct 19 |
About Hosmer Grove Campground
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. No more than two attachments to any single tree. Temporary slacklines will also be permitted under the same conditions as hammocks provided they do not create any other safety hazard. There are no showers or electrical outlets. There is a water station and vault toilets. Pets are not permitted in or around campsite facilities. Camping is limited to 3 nights in any 30-day period. Quiet hours are 10 pm to 8 am. Check out time is 11 am.
Recreation
Hikers will find more than 30 miles of trails that journey down into the crater for exploring its many features. There is no shade or water on the crater floor, and temperatures can vary significantly, so pack along plenty of water and sunscreen. Also, due to the soft sandy nature of the trails, plan on spending twice as much time to hike out as to hike in. A self-guided trail begins at the Hosmer Grove campground and ends at the campground. If you are a bird watcher the early dawn is great viewing of the many native birds in the area, making this a beautiful early morning hike.
Facilities
Each campsite has one picnic table and a grill (bring charcoal, no wood collecting permitted). Contained camp stoves are allowed. There are no showers or electrical outlets. There is a water station and vault toilets. . 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. No more than two attachments to any single tree. Temporary slacklines will also be permitted under the same conditions as hammocks provided they do not create any other safety hazard.
Natural Features
Located in the Summit District of Haleakala National Park, high on the slopes of Haleakala at nearly 7000 ft in elevation. Be prepared for rain and cold weather. Nighttime temperatures can drop to near freezing in the winter. Daytime temperatures range from 50 degrees to 65 degrees F. Temperatures are comfortable in the summer, but be prepared for rain at any time. A self-guided trail begins and ends at the campground. The forest comes to life in the early dawn with the many native birds in the area, making this a beautiful early morning hike.
Enjoy the sunrise at the Summit of Haleakala.
Nearby Attractions
A Visitor center is located a short distance up the summit road. Additional hiking information is available at the visitor center where you will find an array of displays with Rangers to speak with. Junior Ranger program available for families with young children. Public flush toilets are located at the visitor center. A second visitor center is located at the rim of the volcano.
Grocery stores and shopping are located in Pukalani or historic Makawao town. These are at least a 45 minute drive back down the road towards the Kahului airport.
6 monitored sitesNo hookupsMax party 6
Getting there
From Kahului it is 28 miles of scenic drive along the Haleakala Highway 37 to 377, but the winding road makes the drive pretty slow. Allow at least 1 hour 45 minutes from Kahului to the entrance station of the Park. You can stop in Pukalani for shopping or fast food.
Po Box 369, Makawao, HI 96768808 572-4411
CampingHistoric & Cultural SiteScenic DriveStar GazingVisitor CenterWildlife Viewing
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-10068557 · facility + sites
Photo gallery
Roll CS-10068557 · Hosmer Grove Campground · Makawao HI12 frames · facility + sites
FAQ
How do I get a reservation at Hosmer Grove Campground?
Reservations for Hosmer Grove Campground are made through Recreation.gov. 93.3% of tracked site-nights are not currently open for online reservation; 74 of 1,098 remain open. Campsite Sniper has also detected 113 site openings here in the last 90 days, so further dates may appear. Pick a site on the map to see its calendar, or set a free Campsite Sniper alert. You complete the reservation yourself on Recreation.gov.
Does Campsite Sniper book this campground for me?
No. Campsite Sniper sends alerts and direct Recreation.gov links. It never books, pays for, holds, hoards, or resells reservations.
How current is this availability data?
Campsite Sniper re-checks public Recreation.gov availability for this facility every hour and republishes whenever anything changes. This facility's data last changed at Sep 18, 2026 15:19 UTC; an older timestamp means nothing has changed since that time, not that checking stopped. Always confirm final availability on Recreation.gov when you book.
How often do new openings appear at Hosmer Grove Campground?
Campsite Sniper detected 39 site-date openings at Hosmer Grove Campground in the last 7 days, 103 over 30 days and 113 over the last 90.
Can I get a multi-night stay at Hosmer Grove Campground?
11 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 20 at site 5. Confirm and book on Recreation.gov.
Which month has the most availability at Hosmer Grove Campground?
October 2026, with 48 open site-nights in the current snapshot of 186.
How far ahead of a stay do openings appear at Hosmer Grove Campground?
Half of the openings Campsite Sniper detected appeared at least 29 days before the stay date; the middle 50% landed 29-30 days out. Campsite Sniper can monitor future changes for dates you select.
When is the next open date at Hosmer Grove Campground?
As of the Sep 18, 2026 snapshot: the next open date is Sun, Sep 20 and the next open weekend starts Fri, Sep 25. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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