Winter Park's Trestle Bike Park puts the resort so far ahead of other ski areas wrangling to offer off-season adventure that it might just as well be dubbed Summer Park. The bike park is open daily from mid-June through late September, with up to three chairlifts spinning during peak hours to service a vast network of singletrack trails, downhill bombers and terrain-park features all but guaranteed to push your bike, body armor and helmet to the limits. No, seriously: Pad up. Bob Holme, a former Winter Olympic Nordic ski jumper who is also responsible for the resort's winter ski and snowboard terrain parks, is the man behind the madness, and Trestle Bike Park events like the Colorado Freeride Festival have helped move the sport so far that Mountain Bike Slopestyle will make its debut as an X Games medal event this summer at in Munich.