Openings · last 7 days
283
Booking reality
Campsite Sniper detected 283 site openings here in the last 7 days
01 · Detected Opening History · the openings record · file CS-232492
When St. Mary Campground reopens
St. Mary Campground's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
283
Openings · last 90 days
283
Weekday pattern
Detected openings by day of week · 90dFriday accounted for the largest share of the openings Campsite Sniper detected. 89 of 283 openings detected in the last 90 days occurred on a Friday (31.4%), with Saturday (51) and Sunday (35) next in line.
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 08:00 local-time hours. Those hours contained 244 of 283 detected openings (86.2%). The remaining 13.8% occurred outside those hours. Hours show when Campsite Sniper first detected each opening, in Mountain Time, not when the change was made upstream.
Highest-churn sites
Most openings · 90d| Site | Openings | Share of all openings |
|---|---|---|
| C124 | 7 | 2.5% |
| C128 | 7 | 2.5% |
| C103 | 7 | 2.5% |
| C146 | 7 | 2.5% |
| C102 | 6 | 2.1% |
Site C124 had the most detected openings in the last 90 days: 7. One free watch covers every site here.
02 · Availability Outlook · Sep 18, 2026 – Mar 19, 2027 · of 142 monitored sites
Of the 6,387 tracked site-nights (Sep 18, 2026 – Mar 19, 2027): 549 open for online reservation · 114 reserved · 39 on sites not offered for online reservation (first-come, first-served or administrative) · 3,965 closed · 139 unavailable (cause unspecified) · 1,581 not yet released.
Where the open windows are
91.4% of tracked site-nights are not currently open for online reservation. 549 of 6,387 remain open; here is where they are.
Load status
Sep 18, 2026 – Mar 19, 2027Not open online91.4%
Open site-nights549 / 6,387
Reserved (of online inventory)114 / 663
Weekday openings326
Weekend openings202
Of the open site-nights on mapped sites, 326 fall on weekdays and 202 on weekends (Fri–Sun). The split covers the 528 open site-nights on mapped sites; 549 site-nights are open across all monitored inventory.
Open dates by month
Sep 2026 – Mar 2027October shows no online availability. 0 of 4,402 tracked site-nights are open there — 31 on sites not offered online, 2,790 closed, 1,581 not yet released.
Holiday windows
Sites open per night · of 139 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 |
|---|---|
| C139 | 13 |
| C102 | 12 |
| C104 | 12 |
| C105 | 12 |
| C108 | 12 |
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 dateFri · Sep 18
Next open weekendFri · Sep 18
October0 of 4,402 · no online availability
The next bookable night is Sep 18; the first open weekend starts Sep 18. Campsite Sniper can watch later dates for you.
Stays and site detail
528 open site-nights across 49 sites at St. Mary Campground, from the same hourly snapshot as everything above.
Multi-night stays. 49 2-night, 49 3-night, 47 7-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 18 at site C139.
RV length. Longest recorded site here is 40 ft. 108 sites take 25 ft, 17 sites take 35 ft, 5 sites take 40 ft.
All 49 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| C139 | 25 ft | None | 13 | 13 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +1 more |
| C102 | 27 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C104 | 30 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C105 | 27 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C108 | 32 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C111 | 27 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C113 | 32 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C115 | 27 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C116 | 25 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C117 | 30 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C121 | 32 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C125 | 22 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C127 | 25 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C131 | 30 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C141 | 40 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C144 | 36 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C149 | 40 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C153 | 22 ft | None | 12 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C101 | 32 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C103 | 27 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C107 | 35 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C109 | 27 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C110 | 30 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C112 | 32 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C114 | 27 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C118 | 32 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C119 | 32 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C120 | 25 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C122 | 30 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C124 | 25 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C132 | 27 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C134 | 32 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C145 | 30 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C146 | 36 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C150 | 30 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C152 | 30 ft | None | 11 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C106 | 30 ft | None | 10 | 10 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C128 | 30 ft | None | 10 | 10 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C130 | 30 ft | None | 10 | 10 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C143 | 25 ft | None | 10 | 10 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C151 | 27 ft | None | 10 | 10 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C137 | 22 ft | None | 9 | 9 nights | Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C147 | 32 ft | None | 9 | 9 nights | Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C155 | 30 ft | None | 9 | 9 nights | Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C123 | 35 ft | None | 8 | 8 nights | Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C126 | 30 ft | None | 8 | 8 nights | Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C148 | 36 ft | None | 8 | 8 nights | Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C133 | 27 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C142 | 40 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
About St. Mary Campground
Overview
St. Mary Campground is the largest campground on the east side of Glacier National Park, and is conveniently located approximately a half-mile from the St. Mary Visitor Center. The visitor center offers interpretive programs, shuttle service and Red Bus tours leaving from the center. The campground sits near the entrance of the popular scenic byway, the Going-to-the-Sun Road.
Beginning August 17th through September 11th, St. Mary Campground will transition to a day-of reservation window, reservations for these dates may not be made in advance but must be made on the day of anticipated camping.
Generators are allowed only in Loops B & C. Generators are prohibited in Loop A.
For information on nearby campgrounds, including on US Forest Service land or the Blackfeet Nation, take a look at Glacier National Park's website .
Recreation
St. Mary Campground is located on the east side of the park, which boasts some of the best trails available for day hiking. Trailheads start at a higher elevation than those on the west side, so less ascent is required to reach scenic vistas.
Facilities
Potable water is accessible in the campground, and restroom facilities provide flush toilets and sinks with running water.
A couple of miles down the road and outside the park, visitors will find all the comforts of home, including restaurants, gift shops, camp stores, gas and groceries.
Natural Features
Though shade is sparse, the aspen trees that grace St. Mary Campground flutter in spring and summer breezes and provide colorful splashes of yellow late in the season. Views of Singleshot, East Flattop and Red Eagle Mountains provide a dramatic backdrop to the landscape.
St. Mary Lake which, although too cold and occasionally too rough to swim in, provides refreshing scenery on warm days.
Nearby Attractions
One must-see attraction is the sister park across the U.S.-Canadian border, Waterton Lakes National Park . As the other half of the Waterton-Glacier International Peace Park, Waterton Lakes offers fantastic hiking, scenic boat cruises and several scenic drives all centered around the Townsite of Waterton.
Immediately east of Glacier National Park lies the picturesque Blackfeet Indian Reservation , spanning 1.5 million acres. Visit the Museum of the Plains Indian, in Browning, Montana, for a fascinating introduction to the rich cultural heritage of the largest Indian tribe in Montana.
For information on nearby campgrounds, including on US Forest Service land or the Blackfeet Nation, take a look at Glacier National Park's website .
142 monitored sitesRVs up to 40 ftNo hookups50 shadedPets OKFire pitsMax party 24
Getting there
Located a half-mile west of the St. Mary entrance near St. Mary, Montana. Access is from U.S. Highway 89 approximately 33 miles (51 km) northwest of Browning, Montana or over Logan Pass when open. Vehicle restrictions are in effect.
Glacier National Park P.O. Box 128, West Glacier, MT 59936406-732-7708
CampingDay Use AreaFishingHikingInterpretive Programs
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-232492 · facility + sites
Photo gallery
Roll CS-232492 · St. Mary Campground · West Glacier MT12 frames · facility + sites
FAQ
How do I get a reservation at St. Mary Campground?
Reservations for St. Mary Campground are made through Recreation.gov. 91.4% of tracked site-nights are not currently open for online reservation; 549 of 6,387 remain open. Campsite Sniper has also detected 283 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 16:19 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 St. Mary Campground?
Campsite Sniper detected 283 site-date openings at St. Mary Campground in the last 7 days, 283 over 30 days and 283 over the last 90.
Which day of the week had the most detected openings at St. Mary Campground?
Friday accounted for the largest share of the openings Campsite Sniper detected in the last 90 days: 89 of 283 (31.4%). Days reflect when Campsite Sniper first detected each opening, not when the change occurred upstream.
Can I get a multi-night stay at St. Mary Campground?
49 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 18 at site C139. Confirm and book on Recreation.gov.
Which sites at St. Mary Campground fit a 35-foot RV?
17 of the 139 sites that support RV analysis have a recorded maximum of 35 ft or more; the longest recorded is 40 ft.
Which month has the most availability at St. Mary Campground?
September 2026, with 549 open site-nights in the current snapshot of 1,846.
When is the next open date at St. Mary Campground?
As of the Sep 18, 2026 snapshot: the next open date is Fri, Sep 18 and the next open weekend starts Fri, Sep 18. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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