Stowe Mountain Resort, like every other Vermont ski area, is in global-warming gear. An “All Day Summer Attraction Package” — $70 for adults, $64 for kids — includes use of an alpine slide that drops 2300 feet; a bungee trampoline that requires a full body harness; and an inflatable obstacle course. The traditional gondola skyride is always nice, especially when there’s a restaurant serving gourmet Vermont lunches at the top of the mountain. Prefer to get there on your own?