Serrano cancellation alerts.
The Forest Service campground on the north shore of Big Bear Lake, next to the Big Bear Discovery Center, with reservable sites on recreation.gov.
We don't have live numbers on this page right now.
Rather than guess: subscribe and the first email tells you where those nights stand.
We check Serrano availability live when you subscribe — no stale numbers on this page.
Serrano books through recreation.gov. Cancellations happen every day; your Scout's first email tells you exactly where things stand for your dates.
70 cancellations opened 158 nights here
- cancellations we saw
- 70
- gone within an hour
- 39%
- gone within a day
- 86%
- Fri/Sat nights
- 85%
Over the 28 days we have watched it, our checks saw 70 cancellations open up at Serrano (about 18 a week), covering 158 nights, plus 1 larger release of a week or more. Of the 154 nights we saw open and then close again, 39% were gone within an hour of us spotting them, 78% within six hours and 86% within a day. Wednesday was the busiest day for them (21%). 85% 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 Fri, Oct 23 — the night you tapped. Change the dates below if you like.
Email me when a site opens at Serrano
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 107 min). That window is what an instant email wins you.
Open this Scout in the builderCheck recreation.gov yourself →
Recent openings we caught at Serrano
| Detected (local) | Date affected | Resolution |
|---|---|---|
| Fri, Oct 23 | gone by next check (within 107 min) | |
| Sat, Oct 24 | gone by next check (within 107 min) | |
| Fri, Oct 30 | gone by next check (within 52 min) | |
| Sat, Oct 31 | gone by next check (within 52 min) | |
| Fri, Oct 23 | gone by next check (within 51 min) | |
| Sat, Oct 24 | gone by next check (within 51 min) | |
| Fri, Oct 23 | gone by next check (within 274 min) | |
| Sat, Oct 24 | gone by next check (within 274 min) | |
| Fri, Oct 23 | gone by next check (within 53 min) | |
| Sat, Oct 24 | gone by next check (within 53 min) | |
| Fri, Oct 23 | gone by next check (within 54 min) | |
| Sat, Oct 24 | gone by next check (within 54 min) | |
| Fri, Oct 23 | gone by next check (within 48 min) | |
| Sat, Oct 24 | gone by next check (within 48 min) | |
| Fri, Oct 23 | gone by next check (within 244 min) | |
| Sat, Oct 24 | gone by next check (within 244 min) | |
| Fri, Oct 23 | gone by next check (within 178 min) | |
| Sat, Oct 24 | gone by next check (within 178 min) | |
| Fri, Oct 30 | gone by next check (within 43 min) | |
| Sat, Oct 31 | gone by next check (within 43 min) |
Watching since Sep 23, 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
How often do sites open up at Serrano?
Over the 28 days we have watched it, our checks saw 70 cancellations open up at Serrano (about 18 a week), covering 158 nights, plus 1 larger release of a week or more. Of the 154 nights we saw open and then close again, 39% were gone within an hour of us spotting them, 78% within six hours and 86% 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 Serrano?
Wednesday was the busiest day for them (21%). 85% 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/san-bernardino-nf/serrano.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 Serrano opens up:
POST https://campsitecancellations.com/scouts/subscribe
Content-Type: application/json
Accept: application/json
{"targetSlug":"san-bernardino-nf/serrano","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
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