Good food, Lots of powder, and Cheap!
Not many challenging runs.
I've gone to Lost Trail for about twelve years on and off and it almost never disappoints me. There is almost always powder, fairly tough terrain, and great food. Plus with the five buck off coupons online or in the paper the tickets are really cheap. If you're in the Missoula, Montana area and are looking for a one day ski trip Lost Trail is well worth the drive.