Campsite Odds

Booking odds · December

Hosmer Grove Campground in December: How Hard Is It to Book?

Hosmer Grove Campground · HI · Haleakalā National Park

The verdict

Hard

Booking difficulty 8 out of 10. Competitive. Be ready when the booking window opens.

Rarely sells outBased on 3 years of reservation data

December rarely sells out — you can often book close to your trip.

Hosmer Grove Campground in December scores 8 out of 10 for booking difficulty — hard. Competitive. Be ready when the booking window opens.

Across the last 3 years of reservation history, the typical December booking was locked in about 30 days before arrival, with the campground running roughly 115% full that month. The lightest arrival day is Tuesday, so shifting to a midweek start is the single easiest way to improve your odds.

Lead time

How far ahead people book

Same day: 2% of bookingsSame day1–3d: 10% of bookings10%1–3d4–7d: 5% of bookings5%4–7d1–2wk: 5% of bookings5%1–2wk2–4wk: 48% of bookings48%2–4wk1–2mo: 2% of bookings1–2mo2–3mo: 6% of bookings6%2–3mo3–6mo: 20% of bookings20%3–6mo6mo+: 1% of bookings6mo+Median booking lead time: 30 days ahead
Demand split

Weekend vs. weekday demand

Weekend (Fri–Sat)Weekday (Sun–Thu)

Best odds: arrivals are lightest on Tuesday in December. A midweek arrival is your easiest booking.

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Booking window · December 2026

When December reservations open

Reservations for Hosmer Grove Campground in December 2026 operate on a rolling 6-month window releasing at 7:00 AM ET.

December 1 stays open

June 1, 2026

at 7:00 AM ET

Release style

6-Month Rolling Window

Releases daily 6 months ahead at 7:00 AM ET

Campsites for December 1, 2026 become bookable on June 1, 2026 at 7:00 AM ET. Each subsequent date throughout December 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.

Fees

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.

FAQ

Hosmer Grove Campground in December: common questions

How hard is it to book Hosmer Grove Campground in December?
Hosmer Grove Campground rates 8 out of 10 for December — Hard. Competitive. Be ready when the booking window opens.
How far in advance should I book Hosmer Grove Campground for December?
The typical December reservation was made about 30 days before arrival, so plan to book as early as your dates allow.
When do December reservations open for Hosmer Grove Campground?
Reservations for Hosmer Grove Campground in December 2026 open on a rolling 6-month window. Sites for December 1 become bookable on June 1, 2026 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 December?
Arrivals are lightest on Tuesday. A midweek arrival is usually the easiest booking.

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