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Lake Mary Campground

Inyo National Forest — lakeside, fishing

Location: Palo Alto, CA, CA

Price: From $34 per night

Rating: 4.2 out of 5 (199 reviews)

Season: May through October

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.

Cell coverage (FCC estimate): strong signal. Actual signal may vary in remote areas. Best carrier: T-Mobile. Verizon 4G: 100%. AT&T 4G: 100%. T-Mobile 4G: 100%.

Amenities: Fire Rings, Picnic Tables, Fishing

Availability alerts: Set a free cancellation alert at camperwatch.org/campground/lake-mary-campground to be notified when sites open up.

Lake Mary is the largest and most developed lake in the Mammoth Lakes region with excellent trout fishing (rainbow, brook, and brown trout). Campers praise spacious, shaded sites with clean facilities and attentive camp hosts.

Wildlife alert: American Black Bear, North American Porcupine, Mule Deer, Mountain Garter Snake, and various birds including Steller's Jay and Common Raven

Insider tips for Lake Mary Campground: Book early as this is a federal campground with high demand Site 043 noted as nicely leveled and close to water/restroom facilities Bathrooms have flushing toilets but no shower facilities; nearest showers at Twin Lakes

Skip Lake Mary Campground if: Seeking privacy or seclusion between sites. Needing RV hookups (none available; only suitable for self-contained RVs). Wanting shower facilities at the campground.

Best time to visit Lake Mary Campground: May-October — Campground operates seasonally during these months only.

Nearby campgrounds: Twin Lakes Campground (Mammoth Lakes, CA), Coldwater Campground - Inyo Nf (Ca) (Mammoth Lakes, CA), New Shady Rest Campground (Mammoth Lakes, CA), Sherwin Creek (MAMMOTH LAKES, CA).

Cell Phone Coverage at Lake Mary Campground

Cell signal at Lake Mary Campground (Palo Alto, CA): strong overall signal based on FCC broadband data. Best carrier: T-Mobile.

  • Verizon 4G LTE: 100% coverage
  • AT&T 4G LTE: 100% coverage
  • T-Mobile 4G LTE: 100% coverage · T-Mobile 5G: 100%

Coverage data source: FCC Broadband Data Collection (BDC). Actual signal may vary due to terrain, tree cover, and distance from towers. Camper reports are more reliable than coverage maps in remote areas.

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Lake Mary Campground — photo 1
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Inyo National Forest — lakeside, fishingLive availability via Recreation.gov· synced every 30 min

Lake Mary Campground

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Palo Alto, CA, CA★ 4.2 (199 reviews)From $34/nightFederal campground · book on Recreation.gov
On this page ↓OverviewConditionsPlan Your TripCommunity

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.

Best for:AnglersFamiliesSites:TentRV
LIVE · weather + fire + AQI + availability + wildlife

Verified facts

RIDB / Recreation.gov official database
Check-in2:00 PM
Check-out12:00 PM
SeasonMay through October
Stay limit14 days
Max RV21 ft
HookupsNo hookups. Suitable for self-contained RVs.
PetsAllowed
CampfiresAllowed
Max/site6 people

Amenities

RIDB /facilities /campsites · owner-verified
Essentials
Fire Rings
Recreation
Picnic Tables
Family & Pets
Fishing

Straight talk

CamperWatch intel · curated from camper reports

Known issues, each with the workaround. Read before you book.

Known issuesFederal campground — book early. No hookups at most sites. Seasonal operations.
Skip it if:✕ Seeking privacy or seclusion between sites✕ Needing RV hookups (none available; only suitable for self-contained RVs)✕ Wanting shower facilities at the campground

Insider tips & when to go

CamperWatch intel · hand-curated entry

Book early as this is a federal campground with high demand

Site 043 noted as nicely leveled and close to water/restroom facilities

Bathrooms have flushing toilets but no shower facilities; nearest showers at Twin Lakes

Best: May-October

Campground operates seasonally during these months only

Things to do nearby

RIDB /activities /recareas + intel

Conditions today

Live
at campground coordinates

Cell signal

FCC BDC · quarterly dataset
T-Mobile
4G + 5G · 100%
Verizon
4G · 100%
AT&T
4G · 100%

FCC maps are theoretical — camper reports confirm signal. Best carrier: T-Mobile.

Wildlife nearby

iNaturalist · research-grade · 8 km
Alert: American Black Bear, North American Porcupine, Mule Deer, Mountain Garter Snake, and various birds including Steller's Jay and Common Raven

Location

Leaflet · OpenStreetMap tiles
Open in OpenStreetMap ↗
760-873-2400· Inyo National Forest
clm@clm-services.com
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.

Campground entrance

Google Maps API

Community

#community · posts, photos & Q&A · AI-moderated (Claude Vision)

Pro tips

  • Book on recreation.gov exactly 6 months ahead at 10am ET — Inyo National Forest fills fast in peak season.
  • Check current road conditions at Inyo National Forest before arrival — seasonal closures common.
  • Bear country — store all food in bear boxes or locked vehicle at all times.

Frequently asked questions

RIDB facts + intel · FAQPage schema, speakable
How much does Lake Mary Campground cost per night?+
Lake Mary Campground costs $34 per night. Hookup options: No hookups. Suitable for self-contained RVs.
What season is Lake Mary Campground open?+
Lake Mary Campground is open May through October. Check-in is 2:00 PM, check-out is 12:00 PM.
Does Lake Mary Campground have hookups?+
No hookups. Suitable for self-contained RVs.
What is the maximum RV length at Lake Mary Campground?+
Lake Mary Campground can accommodate RVs up to 21 feet.
How do I make reservations at Lake Mary Campground?+
Lake Mary Campground is a federal campground — book 6 months ahead at Recreation.gov. Set a free CamperWatch cancellation alert to be notified the moment a site opens.
What is the cell service like at Lake Mary Campground?+
According to FCC coverage maps, cell signal at Lake Mary Campground is rated strong. Best carrier: T-Mobile. FCC maps show theoretical coverage — actual signal in remote or heavily forested areas may be weaker.
What season is Lake Mary Campground open, and what are check-in times?+
Lake Mary Campground is open May through October. Check-in is 2:00 PM, check-out is 12:00 PM.

Official resources

Print Facility MapVista Recreation
Compare campgroundsPlan a multi-stop trip
●Data sources on this page
Recreation.gov — Live site availability — updated every 30 min
recreation.gov · RIDB API
National Weather Service — Live hourly forecast + active alerts
api.weather.gov · open-meteo.com
Google Air Quality API — Live AQI at exact campground coordinates
airquality.googleapis.com
iNaturalist — Research-grade wildlife within 8km
api.inaturalist.org
Google Pollen API — Today’s tree, grass & weed pollen forecast
pollen.googleapis.com
FCC Broadband Map — Verizon, AT&T, T-Mobile 4G/5G coverage data
broadbandmap.fcc.gov · quarterly
Sunrise-Sunset.org — Sunrise, sunset & golden hour for today
api.sunrise-sunset.org
Google Street View — Campground entrance & access road imagery
maps.googleapis.com
RIDB — ADA sites, hookups, toilets, pets, campfire rules, bear boxes, max RV, activities, contact, directions
ridb.recreation.gov · /facilities /campsites /activities /links /recareas

CamperWatch never fabricates data. Where data is unavailable, it is not shown.

$34 /night★ 4.2 (199)
SeasonMay through October
Check-in2:00 PM
Check-out12:00 PM
Reserve on Recreation.gov ↗
Dates full? Get an availability alert
FAQ
How much does Lake Mary Campground cost per night?+
What season is Lake Mary Campground open?+
Does Lake Mary Campground have hookups?+
All 7 questions →

Nearby Campgrounds

Twin Lakes Campground

Mammoth Lakes, CA

From $34/night

Coldwater Campground - Inyo Nf (Ca)

Mammoth Lakes, CA

From $33/night

New Shady Rest Campground

Mammoth Lakes, CA

From $32/night

Sherwin Creek

MAMMOTH LAKES, CA

From $32/night

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