Mammoth Mountain Ski Area is a ski resort in eastern California, located on the east side of the Sierra Nevada mountain range within the Inyo National Forest. The resort is located in the town of Mammoth Lakes, California. The resort covers 3,500 acres (1,420 ha) of skiable terrain, with a vertical drop of 3,100 feet (940 m) and a summit elevation of 11,059 feet (3,371 m). It receives an average of 400 inches (1,020 cm) of snowfall annually and typically offers a ski season from November until May, with some seasons extending into the summer months.
Mammoth Mountain, established by Dave McCoy in the 1940s, developed from a small ski area into a major resort after receiving a U.S. Forest Service permit in 1953 and constructing its first ski lift in 1955. Intrawest Corporation acquired a stake in the 1990s, leading to real estate development, including The Village at Mammoth. In 2005, McCoy sold his majority stake to Starwood Capital Group for $365 million. The resort has undergone infrastructure improvements, including high-speed lifts and a gondola to an interpretive center. In 2017, Mammoth Resorts announced its sale by Starwood to a partnership of Aspen Skiing Company and KSL Capital Partners, later named Alterra Mountain Company.