Denver's Colfax Marathon: 2 days, 7 races. Which will you choose? May 19-20, 2018.
Denver's only marathon. This springtime race is the ultimate urban tour of the city — Marathon runs through the stadium, along 7 miles of rivers, lakes and bridges. Half Marathon treks one mile through the zoo. More than 200 Charity Partners — run for a good cause!
- Hours: Hours vary. See website for more details.