Mono Listing: Mammoth Mountain is unquestionably one of the finest Alpine Skiing Mountain in the world. An average of over 400 inches (33 feet) of snow falls onto the 11,053 foot summit, making the entire 3,500 puls acres of skiable terrain enjoyable for all. Choose from heart-pumping steep chutes, wide open bowls, tree skiing, bumps, gullies, or wide open, well groomed trails. Mammoth Mountain has the best terrain parks for snowboarding. Constantly upping the bar, the Unbound Parks have make it a point to keep features new every season. Fresh rails, boxes, and a Wall Ride are only enhanced our world-class stystem of pipes. Mammoth Mountain during the spring months of April and May offers some of the year's best skiing and snowboarding. In heavy snow years Mammoth Mountain Ski Area may stay open until mid-June - sometimes until July 4th.