The last ski area still open for the 2009-10 season in Colorado, Arapahoe Basin, closed at the weekend.
Snowbird in Utah however is open for at least one more weekend and possibly longer. It hasn't had any fresh snow recently but has 2.3m (90 inches) of snow lying at mid mountain and recently passed the 600 inches (15 metres) of snow accumulated this season in total. The total is 603 inches.
In California Mammoth Mountain still has the best part of a month of its long season left, it's open daily and plans to remain so until at least the US Independence day, July 4th. It most recently received five inches (13cm) of new snow on May 27th and currently has a 4 - 7 foot (1.2 - 2.1m) of snow.
America's near year-round ski centre of Timberline on Mt Hood in Oregon is the other open ski area in North America. Its lifts. Terrain park and pipe are all open. There's a 131inch (3.25m) base at present.