What is the Leadville 100?

A double-barrel shotgun shatters the cold morning in Leadville, Colorado. Some 2,000 racers begin to stream from the old mining town toward the mountains beyond town for what is by all accounts one of the world’s toughest mountain bike races. Leadville is largely contested on old mining roads made up of dirt and rock, and the high point of the race is known as Columbine — an old mine at 12,000 feet above sea level. Joe Dombrowski raced here in 2017, coming in second place, and we’re thrilled to tackle the challenges on offer in Leadville yet again.