How far ahead do you need to book a campsite in Glacier National Park?
For Jul weekends, half of bookings land 16 days+ ahead
For Jul weekends, the busiest month in Glacier National Park, half of Recreation.gov bookings were made at least 16 days before arrival, a quarter at least 152 days ahead, and 35% came 90 or more days out (FY2023–2025). Emery Bay Campground books earliest: half of its Aug weekend bookings came 149 days+ ahead.
Alpenglow over Lake McDonald Photo: Glacier NPS / Wikimedia Commons, Public domain (U.S. National Park Service)
Where campers book earliest
These federal campgrounds draw the earliest Glacier National Park weekend reservations. Pin labels are the median days ahead for each campground's busiest month — plan your reminder from there.
Emery Bay Campground
- Half booked by: 149 days out
- A quarter by: 179 days out
- Weekend bookings: 245
Big Creek Campground (Flathead National Forest, MT)
- Half booked by: 129 days out
- A quarter by: 180 days out
- Weekend bookings: 175
Avalanche Campground
- Half booked by: 28 days out
- A quarter by: 170 days out
- Weekend bookings: 1,812
Fish Creek Campground
- Half booked by: 26 days out
- A quarter by: 172 days out
- Weekend bookings: 3,499
Apgar Campground
- Half booked by: 22 days out
- A quarter by: 170 days out
- Weekend bookings: 3,473
Sprague Creek Campground
- Half booked by: 21 days out
- A quarter by: 159 days out
- Weekend bookings: 535
Lead time is the gap between the day a reservation was made and the arrival date. We measured it for every Recreation.gov booking at federal campgrounds inside Glacier National Park or within 30 miles of its center point over FY2023–2025. The median tells you when a typical camper booked; the 75th percentile shows how early the planners got in, and is the safer target if you want a choice of sites rather than whatever is left. The gap between the two is wide here: a big share of bookings land close to the date, which likely includes sites released by cancellations (the data can't tell us which), while the earliest quarter books months ahead.
Month by month
Days booked ahead, by arrival month, FY2023–2025. Green bar: weekend (Fri/Sat arrival) 75th percentile; gold line: weekday 75th percentile. Months with under 200 bookings are left out.
| Arrival month | Weekend: half booked by | Weekend: a quarter booked by | Weekend 90+ days ahead | Weekday: half booked by | Weekday: a quarter booked by | Bookings |
|---|---|---|---|---|---|---|
| Apr | 2 days out | 18 days out | 11% | 8 days out | 60 days out | 688 |
| May | 27 days out | 112 days out | 31% | 18 days out | 77 days out | 10,990 |
| Jun | 33 days out | 150 days out | 41% | 38 days out | 141 days out | 42,551 |
| Jul | 16 days out | 152 days out | 35% | 15 days out | 152 days out | 52,450 |
| Aug | 17 days out | 168 days out | 36% | 17 days out | 162 days out | 47,482 |
| Sep | 18 days out | 147 days out | 33% | 17 days out | 133 days out | 26,184 |
| Oct | 4 days out | 27 days out | 8% | 4 days out | 28 days out | 2,408 |
Aug weekends draw the earliest planners: a quarter of those bookings came 168 days or more ahead. Weekends book earlier than weekdays in Jul (16 days vs 15 days for the median booking). Off-season months book much closer to the date, so a last-minute trip is far more realistic then.
Campgrounds that book up earliest
Median days ahead for Friday/Saturday arrivals in each campground's busiest month, FY2023–2025 (100+ bookings; group-only campgrounds left out).
| Campground | Busiest month | Half booked by | A quarter booked by | Bookings |
|---|---|---|---|---|
| Emery Bay Campground | Aug | 149 days out | 179 days out | 245 |
| Big Creek Campground (Flathead National Forest, MT) | Aug | 129 days out | 180 days out | 175 |
| Avalanche Campground | Aug | 28 days out | 170 days out | 1,812 |
| Fish Creek Campground | Aug | 26 days out | 172 days out | 3,499 |
| Apgar Campground | Aug | 22 days out | 170 days out | 3,473 |
| Sprague Creek Campground | Jun | 21 days out | 159 days out | 535 |
| St. Mary Campground | Jul | 12 days out | 158 days out | 2,754 |
| Two Medicine Campground | Aug | 6 days out | 156 days out | 1,872 |
At Emery Bay Campground, the typical Aug weekend camper booked about about 5 months ahead, and Big Creek Campground (Flathead National Forest, MT) isn't far behind at about 4 months. If one of these is your first choice, set a reminder for the day reservations open for your dates.
Individual sites that book earliest
Family sites with 50+ reservations over 3+ seasons, ranked by the median days ahead for weekend arrivals (score years, FY2020–21 left out). Group and pay-on-arrival sites excluded.
| Site | Campground | Type | Weekend median lead | Nights reserved / yr |
|---|---|---|---|---|
| 7 | Emery Bay Campground | Standard Nonelectric | 167 days | 122 |
| R028 · West Loop | Many Glacier Campground | Standard Nonelectric | 162 days | 90 |
| R106 · West Loop | Many Glacier Campground | Standard Nonelectric | 160 days | 90 |
| C106 · Loop C- No Generator Loop | Fish Creek Campground | Standard Nonelectric | 159 days | 113 |
| R089 · West Loop | Many Glacier Campground | Standard Nonelectric | 159 days | 90 |
| R040 · West Loop | Many Glacier Campground | Standard Nonelectric | 159 days | 90 |
| R091 · West Loop | Many Glacier Campground | Standard Nonelectric | 159 days | 90 |
| D162 · Loop D | Fish Creek Campground | Standard Nonelectric | 159 days | 73 |
| C113 · Loop C- No Generator Loop | Fish Creek Campground | Standard Nonelectric | 158 days | 93 |
| R045 · West Loop | Many Glacier Campground | Standard Nonelectric | 158 days | 90 |
Then vs now
Before COVID (FY2015–2019), half of Jul weekend bookings came at least 124 days ahead and a quarter at least 175 days ahead; in FY2023–2025 it was 16 days and 152 days. The earliest bookers now book a bit closer to the date than before. FY2020–21 are left out of this comparison.
About this data
Data: Recreation.gov reservations FY2015–2025. These are Recreation.gov's public reservation records (the RIDB historical reservation files), covering every federal campground in the area that took at least 300 reservations in FY2023–2025. Federal fiscal years run October to September, so FY2025 is October 2024 through September 2025.
- Bookings, not occupancy. Each count is a reservation made. Cancellations aren't in the data, so a booked site may later have opened up, and nights a campground was closed simply show no bookings.
- COVID years are flagged. FY2020 and FY2021 were shaped by closures, capacity limits and a camping surge, so we mark them and don't use them for "then vs now" comparisons.
- Lead time is the days between the booking date and the arrival date. Weekend means a Friday or Saturday arrival. First-come, pay-on-arrival sites are left out of lead times.
- Only campgrounds that take reservations on Recreation.gov are included. State parks, private campgrounds and first-come campgrounds aren't in these numbers.
Updated Nov 3, 2026. Distances are straight-line.
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