Openings · last 7 days
6
Booking reality
Campsite Sniper detected 6 site openings here in the last 7 days
01 · Detected Opening History · the openings record · file CS-231973
When Marion Mountain reopens
Marion Mountain's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
7
Openings · last 90 days
9
Only 9 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.
02 · Availability Outlook · Sep 18 – Nov 8, 2026 · of 16 monitored sites
Of the 832 tracked site-nights (Sep 18 – Nov 8, 2026): 607 open for online reservation · 191 reserved · 34 on sites not offered for online reservation (first-come, first-served or administrative).
Where the open windows are
27% of tracked site-nights are not currently open for online reservation. 607 of 832 remain open; here is where they are.
Load status
Sep 18 – Nov 8, 2026Not open online27%
Open site-nights607 / 832
Reserved (of online inventory)191 / 798
Weekday openings420
Weekend openings187
Of the open site-nights on mapped sites, 420 fall on weekdays and 187 on weekends (Fri–Sun).
Open dates by month
Sep 2026 – Nov 2026October holds the most room. 377 of 496 site-nights are still open there.
Holiday windows
Sites open per night · of 16 sites| 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 | 0 | None open |
Labor Day: no online availability on any tracked night. Thanksgiving: no online availability on any tracked night.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| 001 | 43 |
| 019 | 43 |
| 012 | 42 |
| 017 | 41 |
| 002 | 40 |
The 5 sites with the most open site-nights in the current snapshot. Pair a bookable date with a free alert to cover everything else.
Next windows
As of Sep 18, 2026 snapshotNext open dateTue · Sep 22
Next open weekendFri · Oct 2
The next bookable night is Sep 22; the first open weekend starts Oct 2. Campsite Sniper can watch later dates for you.
Stays and site detail
607 open site-nights across 16 sites at Marion Mountain, from the same hourly snapshot as everything above.
Multi-night stays. 89 2-night, 89 3-night, 20 7-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 22 at site 001.
All 16 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 001 | 20 ft | None | 43 | 22 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +31 more |
| 019 | 20 ft | None | 43 | 22 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +31 more |
| 012 | 20 ft | None | 42 | 15 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +30 more |
| 017 | 20 ft | None | 41 | 22 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7 +29 more |
| 002 | 20 ft | None | 40 | 15 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7 +28 more |
| 011 | 20 ft | None | 40 | 22 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7 +28 more |
| 024 | 20 ft | None | 40 | 15 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +28 more |
| 022 | 20 ft | None | 39 | 22 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7 +27 more |
| 018 | 20 ft | None | 37 | 12 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +25 more |
| 010 | 20 ft | None | 36 | 11 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7 +24 more |
| 015 | 20 ft | None | 36 | 12 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 5, Oct 6, Oct 7, Oct 8 +24 more |
| 021 | 20 ft | None | 36 | 15 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7 +24 more |
| 007 | 20 ft | None | 35 | 15 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7, Oct 11 +23 more |
| 006 | 20 ft | None | 34 | 6 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 4, Oct 5, Oct 6 +22 more |
| 020 | Not recorded | None | 34 | 8 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7 +22 more |
| 008 | 20 ft | None | 31 | 6 nights | Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 6, Oct 7, Oct 8, Oct 11, Oct 12 +19 more |
About Marion Mountain
Overview
The Marion Mountain Campground offers a beautiful retreat in the San Bernardino National Forest. It provides access to a number of hiking trails that lead to some of the most spectacular views of Southern California.
The San Bernardino National Forest is submitting a proposal to increase fees at various sites across the Forest and is seeking public input. Please visit the https://www.fs.usda.gov/sbnf for more information and to submit comments regarding this proposal.
Recreation
Visitors enjoy sport climbing on rocks within the campground. Hiking on the nearby Marion Mountain Trail, which leads to San Jacinto Peak, is also available. Views from the peak extend to the ocean and across the Palm Desert, as well as the San Bernardino and San Gabriel mountains on a clear day.
The 11.8-mile Marion Mountain Trail is the shortest route up the mountain, but also quite strenuous in areas. Shorter hikes can be enjoyed on other nearby trails.
Facilities
Marion Mountain campground offers about two dozen campsites for both tent and small RV / van camping. All campsites are equipped with tables and campfire rings with grills. Vault toilets are available within the campground.
Please be aware that potable (safe for drinking) water may or may not be available at this campground. Please plan accordingly.
Natural Features
The campground is located in a forested area at an elevation of 6,400 feet. Mature cedar and pine trees provide ample shade and privacy between campsites.
Nearby Attractions
The campground is located approximately 50 miles from San Bernardino, California, and seven miles north of Idyllwild, which is popular for its small-town atmosphere and variety of shops and restaurants.
16 monitored sitesRVs up to 20 ftNo hookupsPets OKMax party 8
Getting there
From Interstate 10 in Banning, take Highway 243 south for about 20 miles to Alandale. Travel east on Stone Creek Campground Road for about 2 miles to Marion Mountain Campground.
Po Box 518, Idyllwild, CA 92549909-382-2922
BikingCampingFire Lookouts/Cabins OvernightFishingHikingHorseback Riding
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-231973 · facility
Photo gallery
Roll CS-231973 · Marion Mountain · Idyllwild CA6 frames · facility
FAQ
How do I get a reservation at Marion Mountain?
Reservations for Marion Mountain are made through Recreation.gov. The current snapshot shows substantial availability: 607 of 832 tracked site-nights are open (73%), though availability can change. Campsite Sniper has also detected 9 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.
Does Campsite Sniper book this campground for me?
No. Campsite Sniper sends alerts and direct Recreation.gov links. It never books, pays for, holds, hoards, or resells reservations.
How current is this availability data?
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 17:19 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.
How often do new openings appear at Marion Mountain?
Campsite Sniper detected 6 site-date openings at Marion Mountain in the last 7 days, 7 over 30 days and 9 over the last 90.
Can I get a multi-night stay at Marion Mountain?
89 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 22 at site 001. Confirm and book on Recreation.gov.
Which sites at Marion Mountain fit a 35-foot RV?
No RV-analyzable site here has a recorded maximum of 35 ft or more; the longest recorded is 20 ft. 15 of those 16 sites have a recorded maximum length and 1 does not; it is not counted as fitting.
Which month has the most availability at Marion Mountain?
October 2026, with 377 open site-nights in the current snapshot of 496.
When is the next open date at Marion Mountain?
As of the Sep 18, 2026 snapshot: the next open date is Tue, Sep 22 and the next open weekend starts Fri, Oct 2. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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