This picturesque mountain town at the base of the Rockies is a cyclist’s paradise. Boulder boasts hundreds of miles of bike paths, nearby access to world-class mountain biking trails such as Walker Ranch and over 300 days of sunshine a year. The city’s bike share program, Boulder B-cycle, offers 24-hour bike access at any B-station; just swipe your card, grab a bike and take a ride through town; for mountain biking head to rental shops like Boulder Bikesmith. The only thing that might slow you down is the altitude, but you can easily remedy that by grabbing a post-ride beer at one of Boulder’s many microbreweries.