For years we've schemed of mountain biking in the USA. We knew it would be a mind-blowing good time. The tough question was "where do we go?" - the place is so huge and the possibilities for biking so enormous. We decided to concentrate on the places we'd heard the most about: South West Colorado; and Moab, Utah. We wanted to minimise long hauls in the car, and managed to link up the quintessential mountain bike destinations in a tight loop: Durango; Telluride; Crested Butte; and Moab - scoring a couple of weeks in each spot.