itOpened Blog · Cancellation Data
How Long Does a Cancelled Campsite Stay Open? We Measured It
Everyone who hunts cancellations asks the same question: if a site opens up, how long have I got? Until now the honest answer was 'not long.' We run the scanners, so we measured it — 42 confirmed openings, timed from first detection to confirmed disappearance. The median opening lived 1h 51m.
Quick answers
- How long does a cancelled campsite stay available?
- In our first measured sample of 42 confirmed openings across 11 watched campgrounds, the median opening survived 1h 51m before it was booked again. 15 of 42 (36%) were gone within an hour, and every one of the 42 was gone within nine hours.
- What was the fastest a cancelled campsite disappeared?
- 4 minutes 34 seconds. That opening — at Watchman Campground, the shortest-lived in the sample — was detected, confirmed, and re-booked inside a single coffee break.
- Why do cancelled campsites vanish so fast?
- Because they are being bought, not expiring: in 35 of the 42 cases, the closing poll recorded the site's status as Reserved on every night of the stay. A cancelled site returns to a market full of people (and scanners) already watching it.
- If I check twice a day, will I catch one?
- Usually not by timing alone. A twice-a-day checker samples two instants against a median window of about 1h 51m — the opening has to be alive at one of those two instants. Flexibility on dates and campgrounds matters more than refresh speed.
Watch it with itOpened
The median opening lives 1h 51m. A text arrives in seconds.
That measurement is the product: our scanners poll the official calendars every 2.5 minutes on the hot tier, confirm each opening, and text you while it is still alive — instead of you sampling the calendar twice a day and hoping.
Proof, from our own scanners: 13 confirmed openings at Watchman since Oct 29, 2026 — each one re-verified before logging. See the live cancellation index.
Watch Watchman openingsFree to start. We never book, hold, or resell — you book it yourself, in your own account, at the normal price. Fees pay for monitoring; openings are first-come and cannot be guaranteed.
Every cancellation hunter has a story about the site that got away: the Recreation.gov tab left open over lunch, the perfect Saturday night that was there at 9:00 and gone at 9:20. What nobody has had — including us, until we built the instrumentation — is a measurement. Anecdotes say "fast." Forums say "instantly." Neither is a number.
So here is a number, with its working shown. Our scanners watch the official calendars of 100 iconic campgrounds. When a previously unavailable site flips to Available, the opening is confirmed by an immediate re-check and logged. Since this morning we also track the other half of the story: every confirmed opening is followed until it disappears, and disappearance is only recorded after two consecutive polls find it gone. 42 openings have now completed that full life cycle. This post is what they did.
The headline numbers
| Measure | Result |
|---|---|
| Openings tracked end-to-end | 42, across 11 campgrounds |
| Median survival | 1h 51m |
| Mean survival | 2h 35m |
| Middle half of openings | 35m to 2h 33m |
| Gone within 1 hour | 15 of 42 (36%) |
| Gone within 3 hours | 32 of 42 (76%) |
| Shortest-lived opening | 4 minutes 34 seconds (Watchman Campground) |
| Longest-lived opening | 8h 58m (Elkmont Campground) |
| Ended as Reserved on every night | 35 of 42 |
Read the median carefully, because it is the whole strategy in one figure: half of all cancelled-site openings are re-booked within 1h 51m of appearing. Not within a day. Not "check back tonight." Within roughly the length of a movie — and a third of them, 36%, inside an hour. The distribution is also lopsided: the mean (2h 35m) sits well above the median because a minority of openings linger for several hours while the typical one is snapped up fast. If you plan around the average, you are planning around a fiction; the median is the market you actually compete in.
Why they vanish: they are bought
An opening can end two ways — someone books it, or the calendar state changes for another reason (a hold lapsing back out, a facility correction). The closing polls tell us which: in 35 of the 42 cases, the final observed status was Reserved across every night of the stay. These openings did not evaporate. They were purchased, by someone whose timing was better than the median. The remaining cases ended with mixed night-by-night statuses, consistent with partial stays being picked apart night by night — which matches another pattern in the data: 28 of the 42 openings were single-night stays, the fragments other campers left behind when they trimmed a longer trip.
The extremes are the lesson
The shortest-lived opening in the sample lasted 4 minutes 34 seconds — a 4-night stay at Watchman Campground that appeared and was re-booked before most people's email refreshes once. The longest, at Elkmont Campground, survived 8h 58m — still under nine hours, and it is the outlier, not the norm: nothing in the sample lived to see a second day. If your strategy is "I'll check in the morning and again after dinner," you are fishing in a pond that is stocked and drained between your visits. That is not a criticism of the strategy's effort; it is arithmetic about its sampling rate.
What this sample cannot tell you (read this before quoting it)
We would rather lose a headline than overclaim, so here are the limits, plainly. First, this is one day of observation — October 30, 2026 — covering stays in November and December 2026 at the 100 campgrounds our house registry watches. Peak-summer openings at Yosemite may die faster; a wet Tuesday in February may live longer. Second, the sample is right-censored: openings that were still available when the sample closed are not in these 42, so the true median for all openings is somewhat longer than 1h 51m — the figure describes openings that completed their life cycle inside the window. Third, survival is measured between polls — every 150 seconds on our hot tier and every 600 seconds on the standard tier — so each figure is precise to within its poll interval, not to the second. The dataset grows every day, and we will republish as it does; the live counts are always on the cancellation index.
How to hunt with a 1h 51m median
Four conclusions survive the caveats. One: speed of notification is the whole game. An opening that lives 1h 51m rewards whoever hears about it in the first minutes and punishes every slower channel — which is why our alerts are texts, not a digest. Two: flexibility multiplies your surface area. Single-night fragments dominate the flow (28 of 42), so a hunter who can stitch two one-night openings, or shift a trip by a day, is fishing a much bigger pond than the one hunting a perfect four-night block. Three: check the shoulder hours. Openings appear around the clock — our full log for the day stands at 463 confirmed openings — not just on release mornings. Four: do not confuse "sold out" with "settled." A campground that shows full at breakfast has, on this evidence, a live second market running underneath it all day. The sites are moving. The only question is whether you hear about the movement in time — and that is exactly the problem itOpened was built to solve.
Watch it with itOpened
The median opening lives 1h 51m. A text arrives in seconds.
That measurement is the product: our scanners poll the official calendars every 2.5 minutes on the hot tier, confirm each opening, and text you while it is still alive — instead of you sampling the calendar twice a day and hoping.
Proof, from our own scanners: 13 confirmed openings at Watchman since Oct 29, 2026 — each one re-verified before logging. See the live cancellation index.
Watch Watchman openingsFree to start. We never book, hold, or resell — you book it yourself, in your own account, at the normal price. Fees pay for monitoring; openings are first-come and cannot be guaranteed.
Frequently asked questions
How was campsite survival time measured?
Each confirmed opening is logged when our scanner detects it (after an immediate confirmation re-check) and followed until two consecutive polls find it gone. Survival is the elapsed time between first detection and confirmed disappearance, precise to within the poll interval: 150 seconds on the hot tier, 600 seconds on the standard tier.
Does a median of 1h 51m mean every opening lasts that long?
No. Half died sooner — 15 of 42 within an hour, the fastest in 4 minutes 34 seconds — and half lasted longer, up to 8h 58m. The median is the midpoint of this sample, not a promise about any single opening.
Which campgrounds were in the sample?
The 42 completed life cycles came from 11 of the 100 campgrounds in our house watch registry — the openings that both appeared and disappeared inside the October 30, 2026 observation window. Openings still available at the window's end are excluded, which biases this sample toward shorter lives; we say so wherever we cite it.
Do cancelled campsites really get re-booked, or do they just disappear?
They get re-booked. In 35 of the 42 cases, the closing poll recorded the site's status as Reserved on every night of the stay.
Sources
- itOpened scanner logs, October 30, 2026: engine/alerts.jsonl (463 confirmed openings) and engine/closures.jsonl (42 completed opening life cycles across 11 campgrounds; median survival 6648 seconds, computed from the log at build time, October 30, 2026). Method: disappearance requires two consecutive gone polls; hot tier polls every 150 seconds, standard tier every 600 seconds.
- itOpened methodology: how our scanning and confirmation works (/methodology/).
Every figure in this article traces to one of the sources above. If a number isn't sourced, we don't print it.
Last updated 2026-10-30.