Most camping apps are built for finding campgrounds and reading reviews. CampSage is built for the harder problem: getting into one that’s already booked by catching cancellations the second they happen — and it’s free to do it.
CampSage exists to do one thing well: catch a site the moment someone else gives it up. The whole map is openings — not a directory you have to check by hand.
Set an email alert on any campground for free and we'll tell you when a spot opens. Most apps put availability alerts behind a paywall — ours are free.
Pro re-checks contested parks around the clock and texts you as soon as we see a site free up — the difference between booking it and watching it vanish.
See how many sites are open on the same dates and how many are right next to each other — so a group can actually camp together.
Filter by nights, weekends, dates, group size, feature (lakeside / river / national forest) and 📶 cell coverage — then share that exact view with a link.
Know before you go whether you'll have a signal, from real camper reports, right on the park page.
One map across Recreation.gov and ReserveCalifornia (including the hard-to-book coastal state beaches) — most tools cover only one.
Works in any browser on any phone — nothing to install, and no sign-up needed to see the live openings map.
Measured by CampSage between 2026-07-10 and 2026-09-01. We re-scan roughly every 4–5 hours, so “under 5 hours” is the finest gap we can actually measure — a site may well have gone sooner. Free email alerts ride the same 4×-daily scan. Pro re-checks your watched parks about 108 times a day — every 10 minutes through the day, hourly overnight.
| CampSage | Rec.gov / ReserveCA | |
|---|---|---|
| Map built around live openings & cancellations | ✓ Free | ✗ |
| Availability / cancellation alerts | ✓ Free (email) | ✗ |
| Alerted within minutes, not a few times a day | ✓ Pro | ✗ |
| “Just opened” detection with timestamps | ✓ | ✗ |
| Group availability (sites open together + adjacent) | ✓ | ✗ |
| Watch one exact campsite, not just the campground | ✓ Pro | ✗ |
| Cell-coverage info per site | ✓ | ✗ |
| Shareable filtered map link | ✓ | ✗ |
| Works with no app & no account | ✓ | ✓ |
| Price to catch a cancellation | Free · Pro $59/yr | Free (no alerts) |
✓ yes · ~ partial · ✗ no. Reflects how the booking sites work as of 14 Aug 2026 — spot something wrong? Tell us.