2015 is your year to run the Colfax Marathon - Denver's springtime race! 26.2 epic miles of Denver's best landmarks: through Mile High Stadium, along 7 miles of rivers, lakes and bridges, through a fire station and on America's longest Main Street: Colfax Avenue. The Half Marathon is fast, flat and fun, with a one mile trek through Denver Zoo. Run for one of 150 Charity Partners! Register now for the 10th Anniversary race on Sunday, May 17, 2015 at www.runcolfax.org. The earlier you register, the lower the price.