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is an incorporated town in Mono County, California, United States. The population was 7,093 at the 2000 census.
Mammoth Lakes is located at , at an elevation of approximately 7900 feet (2400 m).
According to the United States Census Bureau, the town has a total area of 25.2 square miles (65.2 km²), of which, 24.8 square miles (64.2 km²) of it is land and 0.4 square miles (1.0 km²) of it (1.51%) is water.
Mammoth Lakes resides on the edge of the Long Valley Caldera. The area around the town is geologically active, with hot springs and rhyolite domes that are less than 1000 years old.
Visitors can take State Route 203 from the town of Mammoth Lakes to the Mammoth Mountain Ski Area, over Minaret Summit, then down to Devil's Postpile National Monument, with access to the Ansel Adams Wilderness.
The area has natural hot springs which are sometimes used after skiing. Other features include lakes, a soda springs, and an obsidian dome. Mammoth Lakes is north of the Owens Valley, a scenic area with extensive hiking opportunities.
The town is surrounded by mountains: on the west, Mammoth Mountain looms over the town, while to the south, the Sherwin Range dominates the view. This hilly terrain and the high altitude makes the area great for high-altitude training.