St. Mary is booked solid. Cancellations happen every day.
On Glacier's drier east side at the foot of St. Mary Lake — the eastern gateway to Going-to-the-Sun Road. High-season nights book out months ahead.
Right now: open sites on 1 date in August 2026.
Not your dates? Get free alerts the second one opens ↓
Weekends and prime dates still go first — and openings like these are usually re-booked within minutes. A Scout emails you the instant one appears for your dates.
Get emailed the second a site opens at St. Mary. Your Scout starts checking the moment you subscribe — the first email arrives right away with where things stand.
When somebody cancels, the next email in your inbox is your nights at St. Mary — booking link included, while the opening is still live.
Last catch here — a date opened, still open at our last check. That window is what an instant email wins you.
Free — one Scout per email. It only emails you when something actually opens, and you can reply to any of its emails to adjust dates or stop.
Want to change more — different dates logic, extra campgrounds, push instead of email? Open this Scout in the builder. Check recreation.gov yourself →
Recent openings we caught at St. Mary
| Detected (local) | Date affected | Resolution |
|---|---|---|
| Mon, Aug 24 | still open at our last check | |
| Sun, Aug 23 | still open at our last check | |
| Sat, Aug 22 | still open at our last check | |
| Fri, Aug 21 | still open at our last check | |
| Thu, Aug 20 | still open at our last check | |
| Wed, Aug 19 | still open at our last check | |
| Tue, Aug 18 | still open at our last check | |
| Mon, Aug 17 | still open at our last check | |
| Sun, Aug 16 | gone by next check (≤60 min later) | |
| Sun, Aug 16 | gone by next check (≤31 min later) | |
| Sat, Aug 15 | gone by next check (≤5 min later) | |
| Sat, Aug 15 | gone by next check (≤15 min later) | |
| Fri, Aug 14 | still open at our last check | |
| Fri, Aug 14 | gone by next check (≤15 min later) | |
| Fri, Aug 14 | gone by next check (≤46 min later) | |
| Thu, Aug 13 | still open at our last check | |
| Fri, Aug 14 | gone by next check (≤30 min later) | |
| Sat, Aug 15 | gone by next check (≤30 min later) | |
| Sat, Aug 15 | gone by next check (≤46 min later) | |
| Thu, Aug 13 | gone by next check (≤15 min later) |
Watching since Jul 13, 2026, checking about every 15 minutes. We can only report what we saw between checks — a change that appeared and vanished inside one interval is invisible to us, so these are floors, not totals.
From four weeks of this data: how fast campsite cancellations disappear →
How it works
Reading this page for a user? Structured snapshot + change log: /scouts/campsites/glacier/st-mary.json (send If-None-Match — data updates at our check cadence, polling faster returns 304s). Better: subscribe your user once and we email them the moment St. Mary opens up:
POST https://calafia.ai/scouts/subscribe
Content-Type: application/json
Accept: application/json
{"targetSlug":"glacier/st-mary","email":"user@example.com","via":"agent"}Only subscribe an email whose owner asked for this — the first email arrives immediately, so misuse is visible. Full agent docs: /AGENTS.md
Questions
How fast are alerts?
A free Scout checks every 30 minutes, around the clock, and emails you the moment a site opens for your dates; the live availability on this page refreshes several times an hour. Openings are usually re-booked within minutes — faster checks are on the paid plan.
Does it book for me?
No — you get the booking link instantly; booking stays in your hands.
What does it cost?
Watching one thing is free. More Scouts and faster checks are on the paid plan.
How to actually get a campsite at Glacier National Park — the full playbook →