Pick a site on the map to see its site map.
The site details and map below come from the public Recreation.gov record and are accurate. For current dates and to book, go to Recreation.gov.
138 openings were recorded here in the last 90 days, but none in the last 30 — the pattern below would describe the past, not this season, so we do not chart it. A free Campsite Sniper alert watches around the clock instead, and pings you the moment one opens.
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.
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.
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.
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.
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.
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.
View on Recreation.gov ↗ Get directions ↗












Online reservations for this facility, where offered, are made through Recreation.gov. Campsite Sniper has also detected 138 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 does not currently hold availability data for Lake Mary Campground, so there is nothing to date here. That is a gap in coverage — it does not mean the facility is full or closed. Check Recreation.gov for current dates.
Campsite Sniper detected 138 site-date openings here over the last 90 days, none in the last 7. A free alert watches around the clock and pings you the moment one appears.
No RV-analyzable site here has a recorded maximum of 35 ft or more; the longest recorded is 21 ft.
Lakefront, hookups, your RV length, weekends only - set it as picky as you want.
We run paced availability checks for Lake Mary 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.