Openings · last 7 days
56
Booking reality
Campsite Sniper detected 56 site openings here in the last 7 days
01 · Detected Opening History · the openings record · file CS-233404
When Lake Mary Campground reopens
Lake Mary Campground's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
110
Openings · last 90 days
120
Weekday pattern
Detected openings by day of week · 90dNo strong weekday pattern is evident in the openings Campsite Sniper has detected: 120 openings spread across the week.
Hour-of-day pattern
First detected by hour · local time · last 90 daysThe largest concentrations of detected openings were first detected during the 17:00 and 22:00 local-time hours. Those hours contained 30 of 120 detected openings (25.0%). Hours show when Campsite Sniper first detected each opening, in Pacific Time, not when the change was made upstream.
Lead-time profile
Days before stay date · percentilesHalf of the openings Campsite Sniper detected appeared at least 8 days before the stay date; the middle 50% land 4–14.2 days out. Set an alert if you want Campsite Sniper to monitor future openings.
Highest-churn sites
Most openings · 90d| Site | Openings | Share of all openings |
|---|---|---|
| 006 | 8 | 6.7% |
| 026 | 6 | 5.0% |
| 022 | 6 | 5.0% |
| 048 | 6 | 5.0% |
| 018 | 6 | 5.0% |
Site 006 had the most detected openings in the last 90 days: 8. One free watch covers every site here.
02 · Availability Outlook · Sep 18 – Sep 26, 2026 · of 48 monitored sites
Of the 432 tracked site-nights (Sep 18 – Sep 26, 2026): 146 open for online reservation · 282 reserved · 4 on sites not offered for online reservation (first-come, first-served or administrative).
Where the open windows are
66.2% of tracked site-nights are not currently open for online reservation. 146 of 432 remain open; here is where they are.
Load status
Sep 18 – Sep 26, 2026Not open online66.2%
Open site-nights146 / 432
Reserved (of online inventory)282 / 428
Weekday openings118
Weekend openings28
Of the open site-nights on mapped sites, 118 fall on weekdays and 28 on weekends (Fri–Sun).
Open dates by month
Sep 2026 – Sep 2026September holds the most room. 146 of 432 site-nights are still open there.
Holiday windows
Sites open per night · of 48 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 |
Labor Day: no online availability on any tracked night.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| 006 | 5 |
| 010 | 5 |
| 017 | 5 |
| 023 | 5 |
| 024 | 5 |
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 dateSun · Sep 20
The next bookable night is Sep 20. Campsite Sniper can watch later dates for you.
Stays and site detail
146 open site-nights across 45 sites at Lake Mary Campground, from the same hourly snapshot as everything above.
Multi-night stays. 38 2-night, 26 3-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 20 at site 006.
All 45 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 006 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 010 | 19 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 017 | 20 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 023 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 024 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 025 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 026 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 028 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 029 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 030 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 032 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 033 | 18 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 034 | 14 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 042 | 14 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 048 | 14 ft | None | 5 | 5 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24 |
| 016 | 20 ft | None | 4 | 4 nights | Sep 21, Sep 22, Sep 23, Sep 24 |
| 018 | 20 ft | None | 4 | 4 nights | Sep 20, Sep 21, Sep 22, Sep 23 |
| 035 | 14 ft | None | 4 | 4 nights | Sep 20, Sep 21, Sep 22, Sep 23 |
| 038 | 16 ft | None | 4 | 4 nights | Sep 20, Sep 21, Sep 22, Sep 23 |
| 039 | 16 ft | None | 4 | 4 nights | Sep 20, Sep 21, Sep 22, Sep 23 |
| 007 | 19 ft | None | 3 | 2 nights | Sep 20, Sep 23, Sep 24 |
| 014 | 20 ft | None | 3 | 2 nights | Sep 20, Sep 23, Sep 24 |
| 015 | 20 ft | None | 3 | 3 nights | Sep 20, Sep 21, Sep 22 |
| 021 | 20 ft | None | 3 | 3 nights | Sep 22, Sep 23, Sep 24 |
| 031 | 18 ft | None | 3 | 3 nights | Sep 20, Sep 21, Sep 22 |
| 040 | 14 ft | None | 3 | 3 nights | Sep 21, Sep 22, Sep 23 |
| 041 | 18 ft | None | 3 | 3 nights | Sep 21, Sep 22, Sep 23 |
| 047 | 14 ft | None | 3 | 3 nights | Sep 20, Sep 21, Sep 22 |
| 002 | 17 ft | None | 2 | 2 nights | Sep 22, Sep 23 |
| 004 | 17 ft | None | 2 | 2 nights | Sep 23, Sep 24 |
| 008 | 19 ft | None | 2 | 2 nights | Sep 23, Sep 24 |
| 009 | 19 ft | None | 2 | 2 nights | Sep 23, Sep 24 |
| 011 | 19 ft | None | 2 | 2 nights | Sep 23, Sep 24 |
| 019 | 20 ft | None | 2 | 2 nights | Sep 23, Sep 24 |
| 043 | 14 ft | None | 2 | 2 nights | Sep 20, Sep 21 |
| 046 | 14 ft | None | 2 | 2 nights | Sep 21, Sep 22 |
| 050 | 14 ft | None | 2 | 2 nights | Sep 22, Sep 23 |
| 051 | 14 ft | None | 2 | 2 nights | Sep 23, Sep 24 |
| 001 | 17 ft | None | 1 | 1 night | Sep 23 |
| 003 | 17 ft | None | 1 | 1 night | Sep 20 |
| 005 | 21 ft | None | 1 | 1 night | Sep 20 |
| 012 | 21 ft | None | 1 | 1 night | Sep 23 |
| 013 | 21 ft | None | 1 | 1 night | Sep 20 |
| 022 | 20 ft | None | 1 | 1 night | Sep 23 |
| 037 | 16 ft | None | 1 | 1 night | Sep 24 |
About Lake Mary Campground
Overview
Lake Mary is the star of the Mammoth Lakes region. Of the 11 lakes in the area, Mary is the largest and most developed. Lake Mary Campground is a large facility with plenty of amenities in and around it. The lake provides a great base for activities like fishing, viewing waterfalls, hiking and backpacking.
Recreation
Lake Mary receives the highest number of trout stocks in the Mammoth Lakes Basin, and is well-known to anglers for its rainbow, brook and brown trout fishing. No swimming or wading is allowed in the lake.
Though no hiking trails begin in the campground, several interesting trails offer a variety of hikes nearby, including day hiking and backpacking trails into the rustic John Muir Wilderness.
Facilities
The campground straddles the road at the northwest end of Lake Mary, and offers four loops of closely-spaced campsites. The campground is within walking distance of the lake, and some sites have a view of the water.
Natural Features
The campground lies among lodgepole pine trees at an elevation of 8,900 feet. Some campsites have views of the breathtaking scenery surrounding the campground, including Lake Mary and some of the 9,000 and 10,000' peaks in the John Muir Wilderness.
The Eastern Sierra Nevada Mountains are abundant with wildlife, including black bear, mountain lions, mule deer, pine marten, pika and many species of fish and birds.
Nearby Attractions
Mammoth Lakes Basin contains several additional popular lakes to explore for fishing and boating.
Visitors can also access the magnificent John Muir Wilderness nearby, which stretches 100 miles along the crest of the Sierra Nevadas, a land of lofty snow-capped mountains, deep canyons and vast expanses of glacially-carved terrain. Hiking and horseback riding trails are abundant.
48 monitored sitesRVs up to 21 ftNo hookups48 shadedPets OKFire pitsMax party 6
Getting there
Take U.S. 395 to Mammoth Junction and Highway 203. Turn west on Highway 203 and drive through the town of Mammoth Lakes to the junction of Minaret Road/Highway 203 and Lake Mary Road. Continue straight through the intersection and drive 3.6 miles to Lake Mary Loop Drive. Turn right and drive 0.5 miles to the campground entrance.
650 Gilman St, Palo Alto, CA 94301
CampingFishingVisitor Center
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-233404 · facility + sites
Photo gallery
Roll CS-233404 · Lake Mary Campground · Palo Alto CA12 frames · facility + sites
FAQ
How do I get a reservation at Lake Mary Campground?
Reservations for Lake Mary Campground are made through Recreation.gov. 146 of 432 tracked site-nights are currently open (33.8%). Campsite Sniper has also detected 120 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 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.
How often do new openings appear at Lake Mary Campground?
Campsite Sniper detected 56 site-date openings at Lake Mary Campground in the last 7 days, 110 over 30 days and 120 over the last 90.
Can I get a multi-night stay at Lake Mary Campground?
26 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 006. Confirm and book on Recreation.gov.
Which sites at Lake Mary Campground fit a 35-foot RV?
No RV-analyzable site here has a recorded maximum of 35 ft or more; the longest recorded is 21 ft.
Which month has the most availability at Lake Mary Campground?
September 2026, with 146 open site-nights in the current snapshot of 432.
How far ahead of a stay do openings appear at Lake Mary Campground?
Half of the openings Campsite Sniper detected appeared at least 8 days before the stay date; the middle 50% landed 4-14.2 days out. Campsite Sniper can monitor future changes for dates you select.
When is the next open date at Lake Mary Campground?
As of the Sep 18, 2026 snapshot: the next open date is Sun, Sep 20. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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