| Race details | |
|---|---|
| Date | Second Saturday in August |
| Region | Leadville, Colorado |
| Nickname(s) | LT100 |
| Discipline | Mountain Bike |
| Type | 100 Mile Ultra Endurance |
| History | |
| First edition | 1994 |
| Editions | 27 |
The Leadville Trail 100 MTB is the second oldest of the well-known 100-mile (160 km) marathon mountain bike races held in the United States, the oldest being the Wilderness 101 in central Pennsylvania. The Leadville Trail 100 MTB was first run in 1994 and has become one of the best marketed, attended and known marathon events in mountain bike racing.
Entry to the event is controlled and restricted. Some entries are awarded by a random lottery, while other entries are awarded by finishing well in a series of qualifying events. Lottery entries are due by the end of December for the race that is run the second Saturday in August. Qualifying events are similar to the Leadville 100 race but shorter, typically around 100 km in length. Courses for qualifying events typically cover similar terrain (roads, dirt roads, gravel roads and mild trails) with similar vertical elevation gains (~100 feet per 1 mile).