- Source: 1990 UCI Mountain Bike World Championships
- Åre
- 1990 UCI Mountain Bike World Championships
- UCI Mountain Bike World Championships
- Mountain bike racing
- UCI Mountain Bike & Trials World Championships – Men's downhill
- UCI Mountain Bike World Championships – Men's cross-country
- 2019 UCI Mountain Bike World Championships
- 2020 UCI Mountain Bike World Championships
- 1993 UCI Mountain Bike World Championships
- 1991 UCI Mountain Bike World Championships
- UCI Mountain Bike & Trials World Championships – Women's cross-country
The 1990 UCI Mountain Bike World Championships were held in Durango, Colorado, United States. These were the first World Championships in mountain biking to be organised by the Union Cycliste Internationale (UCI). The disciplines included were cross-country and downhill.
Mountain biking world championships had been held since 1986, but without the sanction of the UCI. There had in fact been multiple 'world championships' before 1990, with the United States and Europe holding rival events and each crowning a 'world champion' in each discipline. The UCI decided to host its inaugural world championships in the United States as it was the birthplace of mountain biking. On the recommendation of the United States Cycling Federation, the UCI chose Durango to host the event.