Crested Butte, CO

Hiking is plentiful here, but two wheels are the true star: At this birthplace of mountain biking, you’ll find more bikes than people. Grab one from the Alpineer for a spin on the Lower Loop, a 10-mile network of single- and double-track trails and dirt roads. Or jump on the Upper Loop, a track east of town that takes you along Mt. Crested Butte ($20/day; alpineer.com). Leave the wheels behind as you whiz through a canopy of dazzling aspens on the Crested Butte Zipline Tour, a two-hour adventure that spans five connected lines and three suspended bridges (from $59; 970/349-2211).

Stay: Even inns here get in on the bike love, like the Ruby of Crested Butte, a luxe but low-key B&B with 1,000-thread- count sheets, Frette robes, and loaner cruis- ers in a rack out front. From $229; 2-night min.; therubyofcrestedbutte.com