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 signal at Lake Mary Campground (Palo Alto, CA): strong overall signal based on FCC broadband data. Best carrier: T-Mobile.
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.
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.
Known issues, each with the workaround. Read before you book.
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
Campground operates seasonally during these months only
FCC maps are theoretical — camper reports confirm signal. Best carrier: T-Mobile.









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.
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