Slough Creek is full. Cancellations happen every day.
A tiny campground up a dirt road in the Lamar Valley — prime wolf-watching and cutthroat water. With well under two dozen sites, it is one of the hardest reservations in the entire system.
We only have live numbers for October 2026 on this page.
Rather than guess: subscribe and the first email tells you where those nights stand.
0 open nights in October 2026 — fully booked.
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|
| 25full | 26full | 27full | 28full | 29full | 30full | 31full |
open — tap to book on recreation.govfull — tap to get alerted for that nightweekend
These are live numbers for October 2026, checked when you loaded the page. A watch covers any dates you like.
20 cancellations opened 28 nights here
- cancellations we saw
- 20
- gone within an hour
- 43%
- gone within a day
- 100%
- Fri/Sat nights
- 25%
Over the last 30 days, our checks saw 20 cancellations open up at Slough Creek (about 5 a week), covering 28 nights. Of the 28 nights we saw open and then close again, 43% were gone within an hour of us spotting them, 96% within six hours and 100% within a day. 25% of the nights that opened were Friday or Saturday nights.
These are counts of what our own checks saw (about every 15 minutes); an opening that appeared and was taken between two checks is not in them, so treat every figure as a floor.
Your dates aren't available? Get a free email when one opens ↓
Watching Sat, Jan 9 — the night you tapped. Change the dates below if you like.
Email me when a site opens at Slough Creek
Your first email lands right away with where your nights stand. After that we only write when something opens.
Last catch here — a date opened, gone by our next check (within 36 min). That window is what an instant email wins you.
Check recreation.gov yourself →
Recent openings we caught at Slough Creek
| Detected (local) | Date affected | Resolution |
|---|---|---|
| Mon, Oct 12 | gone by next check (within 36 min) | |
| Mon, Oct 12 | gone by next check (within 226 min) | |
| Mon, Oct 12 | gone by next check (within 108 min) | |
| Sat, Oct 10 | gone by next check (within 119 min) | |
| Sat, Oct 10 | gone by next check (within 119 min) | |
| Mon, Oct 12 | gone by next check (within 306 min) | |
| Sat, Oct 10 | gone by next check (within 154 min) | |
| Thu, Oct 8 | gone by next check (within 37 min) | |
| Sun, Oct 11 | gone by next check (within 74 min) | |
| Mon, Oct 12 | gone by next check (within 74 min) | |
| Sat, Oct 10 | gone by next check (within 39 min) | |
| Wed, Oct 7 | gone by next check (within 39 min) | |
| Mon, Oct 12 | gone by next check (within 39 min) | |
| Wed, Oct 7 | gone by next check (within 35 min) | |
| Mon, Oct 12 | gone by next check (within 821 min) | |
| Mon, Oct 12 | gone by next check (within 43 min) | |
| Sat, Oct 10 | gone by next check (within 49 min) | |
| Sun, Oct 11 | gone by next check (within 49 min) | |
| Mon, Oct 12 | gone by next check (within 49 min) | |
| Sun, Oct 4 | gone by next check (within 69 min) |
Watching since Jul 13, 2026. Our shared checker refreshes about every 15 minutes — that is the measurement; your watch is the alert. A free watch checks every hour; a Priority Pass watch checks every 5 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
Questions
Is Slough Creek sold out this weekend?
As of Oct 25, 12:45 AM MDT, Fri, Oct 30 is full and Sat, Oct 31 is full at Slough Creek. A free watch emails you the moment a cancellation opens either night.
How often do sites open up at Slough Creek?
Over the last 30 days, our checks saw 20 cancellations open up at Slough Creek (about 5 a week), covering 28 nights. Of the 28 nights we saw open and then close again, 43% were gone within an hour of us spotting them, 96% within six hours and 100% within a day. These are counts of what our own checks saw (about every 15 minutes); an opening that appeared and was taken between two checks is not in them, so treat every figure as a floor.
When do cancellations show up at Slough Creek?
25% of the nights that opened were Friday or Saturday nights.
How fast are alerts?
Free: we check every hour, day and night. When a site opens for your nights you get an email with the booking link in it. Priority Pass is $10 once, not a subscription. For one watch, for as long as its dates are open, it checks every 5 minutes instead of every hour, so you hear sooner. A free watch checks every 60 minutes, and a site can open and be taken between two checks.
How many campgrounds can I watch?
As many as you like, on one email address — every campground page has the same form. Each watch is separate, with its own dates and its own one-click stop.
What does it cost?
Watching is free — no card, no account. Priority Pass is $10 once, not a subscription. For one watch, for as long as its dates are open, it checks every 5 minutes instead of every hour, so you hear sooner.
Does it book for me?
No — you get the booking link the moment a site opens; booking stays in your hands, on the reservation system's own site.
How do I stop, or change my dates?
Every email has a one-click stop link. A watch ends by itself the day after your last night, with a note on what it saw. For new dates, subscribe again on the campground page — it takes ten seconds.
For AI agents — feed URL and subscribe API
Reading this page for a user? Structured snapshot + change log: /scouts/campsites/yellowstone/slough-creek.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 Slough Creek opens up:
POST https://campsitecancellations.com/scouts/subscribe
Content-Type: application/json
Accept: application/json
{"targetSlug":"yellowstone/slough-creek","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
Yellowstone National Park camping cancellations & availability — the full playbook →
Keep looking
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