Snowmass can teach us all a lesson in resort development: You needn’t turn your base into Wally World to attract families. There’s a refreshing absence of bungee trampolines and alpine coasters; Snowmass caters to the younger set with 3,132 acres of kid-friendly greens and blues, three terrain parks (no. 7), world-class grooming (no. 3), high-speed lifts (no. 4), ski-in, ski-out lodging (no. 4) and its innovative Treehouse Adventure Center, which is surely to thank for the resort’s consistently high ranking in Family Programs for the fourth straight year.