The Blueprint for Athletes Leadville Trail 100 Run presented by New Balance started with just 45 runners in 1983. The Blueprint for Athletes Leadville Race Series now stretches across three months and hosts thousands of racers on foot and in the saddle. Endurance athletes worldwide now make the pilgrimage to Leadville, Colorado, with the single goal of competing in a “Race Across the Sky.” This season, as always, we look forward to seeing you in Leadville.