Pick a site on the map to see its availability calendar.
Only 10 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 29 tracked site-nights (Nov 2 – Nov 30, 2026): 18 open for online reservation · 5 reserved · 6 on sites not offered for online reservation (first-come, first-served or administrative).
Of the open site-nights on mapped sites, 12 fall on weekdays and 6 on weekends (Fri–Sun).
November holds the most room. 18 of 29 site-nights are still open there.
| Window | Night | Sites open | Status |
|---|---|---|---|
| Thanksgiving | THU Nov 26 | 1 | Open |
| FRI Nov 27 | 1 | Open | |
| SAT Nov 28 | 1 | Open |
Thanksgiving: 1 site is available for the complete three-night stay.
| Site | Open site-nights |
|---|---|
| 1 | 18 |
This site currently has 18 site-nights available.
The next bookable night is Nov 10; the first open weekend starts Nov 13. Campsite Sniper can watch later dates for you.
Multi-night stays. 3 2-night, 3 3-night, 1 7-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Nov 10 at site 1.
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 1 | Not recorded | None | 18 | 9 nights | Nov 10, Nov 11, Nov 12, Nov 13, Nov 15, Nov 16, Nov 17, Nov 18, Nov 19, Nov 22, Nov 23, Nov 24 +6 more |
Crestline Group Campground is located in a wooded area on Palomar Mountain, at approximately 5,390 feet in elevation. Many trees including Black Oak, Cedar, White Fir and Live Oak surround the site. Crestline Group Campground is a convenient place for large families, church groups and other social gatherings of up to 50 people. The facility is a popular recreation site for visitors going to the Palomar Observatory, a world-class center of astronomical research by the California Institute of Technology in North San Diego County. Hiking, biking and picnicking are available nearby.
The campground makes a good base camp for visiting the Palomar Observatory Visitor Center and Palomar Mountain State Park or exploring the surrounding forest. Day hiking, backpacking, biking, picnicking and scenic driving are available in the area.
The accessible site is equipped with several picnic tables in the campground and cooking area, as well as an accessible vault toilet. RVs with a maximum length of 27 feet can be accommodated. No electricity.
The campground sits at an elevation of 5,390 feet in the Palomar Mountains of Southern California. The site is forested but has plenty of open space for star gazing and playing.
From San Diego, California, follow U.S. Highway 15 north to State Highway 76. Proceed east to County Road S6. Take S6 north to the top of Palomar Mountain. Group campground is at the junction of County Roads S6 and S7.
View on Recreation.gov ↗ Get directions ↗












Reservations for Crestline Group Campground are made through Recreation.gov. 18 of 29 tracked site-nights are currently open (62.1%). Campsite Sniper has also detected 10 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 Nov 2, 2026 18:20 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 Crestline Group Campground in the last 7 days, 5 over 30 days and 10 over the last 90.
3 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Nov 10 at site 1. Confirm and book on Recreation.gov.
November 2026, with 18 open site-nights in the current snapshot of 29.
As of the Nov 2, 2026 snapshot: the next open date is Tue, Nov 10 and the next open weekend starts Fri, Nov 13. 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 Crestline 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.