Twin Lakes is full. Cancellations happen every day.
A lakeside campground in the Mammoth Lakes Basin near the trailhead to Twin Falls, in one of the Eastern Sierra's busiest summer recreation areas.
Full for your dates. Every night you asked for is taken at Twin Lakes.
A free watch checks every 60 minutes, and a site can open and be taken between two checks. An email is how you hear.
Your dates are already filled in below — just add your email.
0 open nights in October 2026 — fully booked.
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|
| 23full | 24full | |||||
| 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.
24 cancellations opened 52 nights here
- cancellations we saw
- 24
- gone within an hour
- 40%
- gone within a day
- 88%
- Fri/Sat nights
- 81%
Over the last 30 days, our checks saw 24 cancellations open up at Twin Lakes (about 6 a week), covering 52 nights. Of the 52 nights we saw open and then close again, 40% were gone within an hour of us spotting them, 85% within six hours and 88% within a day. Thursday was the busiest day for them (25%). 81% 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 Tue, Oct 20 — the night you tapped. Change the dates below if you like.
Email me when a site opens at Twin Lakes
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 115 min). That window is what an instant email wins you.
Open this Scout in the builderCheck recreation.gov yourself →
Recent openings we caught at Twin Lakes
| Detected (local) | Date affected | Resolution |
|---|---|---|
| Sat, Oct 10 | gone by next check (within 115 min) | |
| Sat, Oct 10 | gone by next check (within 40 min) | |
| Sat, Oct 10 | gone by next check (within 203 min) | |
| Fri, Oct 9 | gone by next check (within 41 min) | |
| Sat, Oct 10 | gone by next check (within 41 min) | |
| Fri, Oct 9 | gone by next check (within 152 min) | |
| Sat, Oct 10 | gone by next check (within 152 min) | |
| Fri, Oct 9 | gone by next check (within 73 min) | |
| Sat, Oct 10 | gone by next check (within 73 min) | |
| Fri, Oct 9 | gone by next check (within 39 min) | |
| Sat, Oct 10 | gone by next check (within 39 min) | |
| Fri, Oct 9 | gone by next check (within 85 min) | |
| Sat, Oct 10 | gone by next check (within 85 min) | |
| Fri, Oct 9 | gone by next check (within 34 min) | |
| Sat, Oct 10 | gone by next check (within 34 min) | |
| Fri, Oct 9 | gone by next check (within 41 min) | |
| Sat, Oct 10 | gone by next check (within 41 min) | |
| Fri, Oct 9 | gone by next check (within 42 min) | |
| Sat, Oct 10 | gone by next check (within 42 min) | |
| Fri, Oct 9 | gone by next check (within 40 min) |
Watching since Sep 8, 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 Twin Lakes sold out this weekend?
As of Oct 23, 12:53 AM UTC, Fri, Oct 23 is full and Sat, Oct 24 is full at Twin Lakes. A free watch emails you the moment a cancellation opens either night.
How often do sites open up at Twin Lakes?
Over the last 30 days, our checks saw 24 cancellations open up at Twin Lakes (about 6 a week), covering 52 nights. Of the 52 nights we saw open and then close again, 40% were gone within an hour of us spotting them, 85% within six hours and 88% 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 Twin Lakes?
Thursday was the busiest day for them (25%). 81% 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/mammoth-lakes/twin-lakes.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 Twin Lakes opens up:
POST https://campsitecancellations.com/scouts/subscribe
Content-Type: application/json
Accept: application/json
{"targetSlug":"mammoth-lakes/twin-lakes","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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