Colfax Denver Half Marathon 2025. The denver colfax marathon is the city's only marathon and one of the most distinctive urban races in the country. Start and finish in denver’s city park.
The denver colfax marathon & half marathon with detailed race descriptions, registration, course maps, elevation, and past results. 2025 is the inaugural colorado half marathon showdown, with coloradoans competing for a prize of $22,560. The denver colfax marathon is the city's only marathon and one of the most distinctive urban races in the country.
