3. Keystone, CO
Keystone’s A51 park continues to define park building, layout, and progression with some of the most innovative step-ups. Keystone has separated its park “bowl” (serviced by its own double chair) into five trails of freestyle terrain divided by difficulty. Find the mini-shred line on Freda’s incubato, drop in on Park Lane’s medium jump line, or take a cruise through I-70 for street style features, which funnel into the Superpipe. When you’re ready to step it up, Main Street boasts the big boy triple line and creative features including a flat, cliff-style takeoff, and cement Jersey Barriers. If you’re in the market for terrain park nirvana, this is it. —T.L.