Best time of the year to ski the resort... after it's closed and you get the whole mountain to yourself!
Still have the skiing itch but it's late in the spring and the resorts have closed and the other backcountry skiing areas have melted? No problem, just head up to Alta Ski Area and get some amazing backcountry corn skiing laps in.
Drive up Little Cottonwood Canyon all the way to the top and park either in the Collin's or Albion parking lot at Alta. Throw the skins on the skis and head up the mountain. The mountain is your playground and you can go wherever you want. Make your way up to Catherine's Pass, Devil's Castle, or up to the top of Collin's Lift. No lift ticket necessary and no waiting in lines to get on the lift, it's all human powered.