I’ve never been there, but its a fabled mountain. Like most it is really big and it is great to get a “guide”:http://travel.nytimes.com/2008/02/22/travel/escapes/22sun-valley.html so you don’t waste lots of time. The season lasts trhough the third week of April so there is plenty of spring skiing left. Some suggestions from the Ny Times:
BEST MORNING RUN. If workers have groomed Lime Light, which they do about once a week, be at the Challenger Lift by 8:45 a.m. to get first tracks down the 3,100-foot black-to-blue-to-green run. If not, take the same lift, but drop down Ridge, a green run, to the Christmas Lift.BEST AFTERNOON RUN By noon your legs will be simmering in lactic acid, so give them a break on Upper and Lower College, green runs off the Sunnyside Lift ( map), which is sunny indeed.
INSIDER’S TIP After your first run, ride the Challenger Lift up to the Lookout triple chair, where you can drop into Bald Mountain’s bowls of go-where-you-please blue-and-black runs. On windy days head for the protected blue runs off Frenchman’s Lift, where you’ll find quiet lines through the trees.