Booking odds · September
Hosmer Grove Campground in September: How Hard Is It to Book?
The verdict
Booking difficulty 6 out of 10. Books up in the weeks before popular dates. Reserve early.
September rarely sells out — you can often book close to your trip.
Hosmer Grove Campground in September scores 6 out of 10 for booking difficulty — plan ahead. Books up in the weeks before popular dates. Reserve early.
Across the last 3 years of reservation history, the typical September booking was locked in about 29 days before arrival, with the campground running roughly 112% full that month. The lightest arrival day is Wednesday, so shifting to a midweek start is the single easiest way to improve your odds.
How far ahead people book
Weekend vs. weekday demand
Best odds: arrivals are lightest on Wednesday in September. A midweek arrival is your easiest booking.
When September reservations open
Reservations for Hosmer Grove Campground in September 2027 operate on a rolling 6-month window releasing at 7:00 AM ET.
September 1 stays open
March 1, 2027
at 7:00 AM ET
Release style
6-Month Rolling Window
Releases daily 6 months ahead at 7:00 AM ET
Campsites for September 1, 2027 become bookable on March 1, 2027 at 7:00 AM ET. Each subsequent date throughout September releases day-by-day exactly 6 months prior to arrival.
Facility note: Standard Recreation.gov 6-month rolling window: sites become bookable 6 months before arrival at 7:00 AM ET.
How much does it cost to camp at Hosmer Grove Campground?
Camping is year-round unless otherwise stated for emergencies. Camping is $20 per night with a 3-night maximum over a 30-day period. Entrance fees of $30 per vehicle are to be paid when entering the Park. If you own a valid National Park pass, please show to our fee collectors upon entrance. These passes can be used at entrance in lieu of the $30 fee. Sunrise reservation at the Summit of Haleakala is included with the first morning of your campground dates reserved. There are no refunds for camping fees. Any changes to your camping dates must be made through recreation.gov in advance.
Fee details as listed on Recreation.gov. Rates and passes change by season, so confirm the current price on Recreation.gov before you book.
Easier nearby options in September
If your dates are flexible, these nearby campgrounds are typically easier to book.
Hosmer Grove Campground in September: common questions
- How hard is it to book Hosmer Grove Campground in September?
- Hosmer Grove Campground rates 6 out of 10 for September — Plan ahead. Books up in the weeks before popular dates. Reserve early.
- How far in advance should I book Hosmer Grove Campground for September?
- The typical September reservation was made about 29 days before arrival, so plan to book as early as your dates allow.
- When do September reservations open for Hosmer Grove Campground?
- Reservations for Hosmer Grove Campground in September 2027 open on a rolling 6-month window. Sites for September 1 become bookable on March 1, 2027 at 7:00 AM ET, with each subsequent day releasing day-by-day 6 months ahead.
- What is the best day to arrive at Hosmer Grove Campground in September?
- Arrivals are lightest on Wednesday. A midweek arrival is usually the easiest booking.
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