The first UCI Mountain Bike World Championships took place in Durango, Colorado, USA in 1990 and featured only cross-country and downhill events. A separate UCI Trials World Championships had been held since 1986. From 2000 to 2016, the mountain bike and trials disciplines were combined and run as the UCI Mountain Bike &amp; Trials World Championships. Beginning in 2017, the UCI world championships in trials will be run as part of the newly-created UCI Urban Cycling World Championships.