Marathon mountain bike races
Marathon mountain bike races, often referred to as cross country marathon (XCM), are a very demanding form of mountain bike races covering at least 40 kilometres (25 miles) usually in mountainous terrain. Events held in Europe are typically just a little longer than the average cross country mountain bike race. Marathon events in the USA and Canada are typically longer than 100 kilometres (62 miles) and are very different from cross country races.
UCI events 
The UCI has established a championship series for such events, the Marathon World Cup. The UCI rules limit events to distances between 40 km (25 mi) and 120 km (75 mi) and for 2006 limits event to New Zealand, Hungary, Germany, Switzerland, Italy, France and the Netherlands. Almost all of the parcipitants are elite professional mountain bike racers. There is an annual world championship event, the UCI Mountain Bike Marathon World Championships. The distances of the marathon mountain bike series for 2011-2012 are minimum 70 kilometres (43 mi) to maximum 100 kilometres (62 mi) for women and minimum 80 kilometres (50 mi) to maximum 120 kilometres (75 mi) for men. The race can be run over a single lap, or multi-lap with a maximum number laps of three.
Non-UCI events 
Non-UCI events routinely cover much longer distances. The typical event in the USA is either based on time, typically 12 or 24 hours, or distance, the most common being 100 miles (160 km). Events based on hours typically allow either people to compete individually or as part of the team. Distance events are almost all solo events. The number of these events and those taking part in them have grown greatly. The first such events began to be held routinely in the early 1990s typically had less than 50 racers. In 2006 nearly 100 events were held and most had more than 150 racers.
The world's largest mountain bike marathon race by the number of participants is the Birkebeinerrittet, 95 kilometres (59 mi), held annually in Norway. While the distance is short for a marathon mountain bike event, the number of participants and history make it noteworthy.
Racing events 
- Montezuma’s Revenge
- Capitol Forest 100 MTB
- Wilderness 101 Mountain Bicycle Race
- Mohican MTB 100
- Lumberjack 100
- The Endurance 100
- Breckenridge 100
- Leadville Trail 100 MTB
- Brazil Ride more than 500km over 7 days
- Chupacabras (cycling race)
- Freedom Trail, 2400km, 14 days
- Shenandoah Mountain 100
- FAT 55 Oakridge Mountain Bike Marathon, 55 miles
- LA RUTA DE LOS CONQUISTADORES, 161 miles, 3 stages
- UCI Mountain Bike Marathon Club
- UCI 2006 Marathon Championships in Oisans, France
- US National Endurance Mountain Bike Series (not UCI)
- Oakridge Mountain Bike Marathon
|This cycling-related article is a stub. You can help Wikipedia by expanding it.|