Pick a site on the map to see its availability calendar.
Only 2 openings in the last 90 days: not enough recent activity for a reliable pattern. A free Campsite Sniper alert watches around the clock instead, and pings you the moment one opens.
Of the 183 tracked site-nights (Sep 18, 2026 – Mar 19, 2027): 158 open for online reservation · 25 reserved.
Of the open site-nights on mapped sites, 95 fall on weekdays and 63 on weekends (Fri–Sun).
December holds the most room. 31 of 31 site-nights are still open there.
| Window | Night | Sites open | Status |
|---|---|---|---|
| Labor Day | SAT Sep 5 | 0 | None open |
| SUN Sep 6 | 0 | None open | |
| MON Sep 7 | 0 | None open | |
| Thanksgiving | THU Nov 26 | 0 | None open |
| FRI Nov 27 | 0 | None open | |
| SAT Nov 28 | 1 | Open | |
| Christmas | THU Dec 24 | 1 | Open |
| FRI Dec 25 | 1 | Open | |
| New Year | THU Dec 31 | 1 | Open |
| FRI Jan 1 | 1 | Open |
Labor Day: no online availability on any tracked night. Thanksgiving: no site is currently available for the complete three-night stay. Thursday and Friday have no online availability; individual Saturday night remains open. Christmas: 1 site is available for the complete two-night stay. New Year: 1 site is available for the complete two-night stay.
| Site | Open site-nights |
|---|---|
| Site 1 | 158 |
This site currently has 158 site-nights available.
The next bookable night is Sep 20; the first open weekend starts Oct 16. Campsite Sniper can watch later dates for you.
Multi-night stays. 7 2-night, 7 3-night, 3 7-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 20 at site Site 1.
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| Site 1 | 20 ft | None | 158 | 112 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7 +146 more |
Located along Three Rivers, this group campground is ideal for family gatherings and group arrangements. Conveniently located on Highway 22 and surrounded by forest, this campground provides a picturesque setting to enjoy a fun-filled, group camping experience.
The campground offers an open-space style group camping experience, featuring a recently completed picnic shelter. The river provides opportunities for fishing or summer swimming, and hiking trails are within a few miles of the campground.
The group site includes eight picnic tables, picnic shelter, group fire ring, individual rock fire pits, one vault toilet, garbage dumpster, and a parking area. Maximum of 50 visitors per reservation.
Open grassy meadow surrounded by forests, rivers, and coastal mountains, this campground offers a picturesque setting to gather, camp, fish, and play.
From Hebo, OR: Travel south on Highway 22 for 4.2 miles. The campground is on the right.
View on Recreation.gov ↗ Get directions ↗



Reservations for Castle Rock Group Campground are made through Recreation.gov. The current snapshot shows substantial availability: 158 of 183 tracked site-nights are open (86.3%), though availability can change. Campsite Sniper has also detected 2 site openings here in the last 90 days, so further dates may appear. Pick a site on the map to see its calendar, or set a free Campsite Sniper alert. You complete the reservation yourself on Recreation.gov.
No. Campsite Sniper sends alerts and direct Recreation.gov links. It never books, pays for, holds, hoards, or resells reservations.
Campsite Sniper re-checks public Recreation.gov availability for this facility every hour and republishes whenever anything changes. This facility's data last changed at Sep 18, 2026 16:19 UTC; an older timestamp means nothing has changed since that time, not that checking stopped. Always confirm final availability on Recreation.gov when you book.
Campsite Sniper detected 2 site-date openings at Castle Rock Group Campground in the last 7 days, 2 over 30 days and 2 over the last 90.
7 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 20 at site Site 1. Confirm and book on Recreation.gov.
No RV-analyzable site here has a recorded maximum of 35 ft or more; the longest recorded is 20 ft.
December 2026, with 31 open site-nights in the current snapshot of 31.
As of the Sep 18, 2026 snapshot: the next open date is Sun, Sep 20 and the next open weekend starts Fri, Oct 16. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
Lakefront, hookups, your RV length, weekends only - set it as picky as you want.
We run paced availability checks for Castle Rock Group Campground. One watch covers every matching site.
When a match opens, you get a push with a Recreation.gov link so you can review and book it yourself.