Mammoth Mountain is a ski area that a man built with a rope tow. Dave McCoy ran a rope tow on nearby McGee Mountain in 1938, got his Forest Service permit in 1953 and opened the first permanent chairlift, Chair 1, in 1955. The mountain has changed owners a few times since, but the shape is still his: a broad volcanic dome rising to 11,053 feet above the town of Mammoth Lakes, with lifts on every side and snow that often lasts until June.
Mammoth is not a polished Alpine-style village like Aspen or Vail. It is a working Sierra town with a lot of condos, a long drive in, and a mountain that snows more than it should. You come here for 3,500 acres with a high summit, Cornice Bowl and the steep chutes, three base lodges so you can pick the side with the best snow, and a sister mountain, June Mountain, half an hour up the road on the same pass. Five days is the right length: four ski days, one at each corner of the mountain and one at June, and a fifth without skis. Come in spring if you can: the season is the longest of any big resort in the lower 48, and April and May bring soft spring snow and sun.
The plan runs Monday to Friday: Main Lodge and the summit on Monday, Canyon Lodge and the Village on Tuesday, Eagle Lodge and the steeps on Wednesday, June Mountain and Mono Lake on Thursday, and a day without skis on Friday. Start on a Monday if you can, because the weekends here are busy and the Friday naturalist snowshoe tour fits the day off. The Tioga Road to Yosemite is closed in winter, so the other great trip from here is for summer: see 5 Days in Yosemite. More about the country is on the United States page.