Boulderthon Date 2025 Toyota. In 2025, usa today named boulderthon’s 5k the #5th best in the country, while simultaneously announcing its half marathon as the #8th best in the us, in its 2025 10best readers’ choice awards. Find all race information on ahotu.

Colorado’s premier fall race series: Last year 3.1% of finishers qualified for the boston marathon and 5.3% of runners qualified for boston in 2022.