Denver Half Marathon

Course & Elevation

The Colfax Half Marathon is the half marathon of the Denver Colfax Marathon weekend, held on a Sunday in May in Denver, Colorado. The weekend, first run in 2006, also includes the Colfax Marathon, an Urban 10 Miler, a marathon relay and a 5K. The half marathon starts at 6:30 a.m. on the east side of Ferril Lake in City Park and finishes in City Park. It passes the Denver Museum of Nature and Science and runs along Montview Boulevard before spending a mile inside Denver Zoo. It then follows Colfax Avenue past the Cathedral Basilica, the Capitol and Civic Center Park. The route goes through Denver Fire Station No. 1, where firefighters give high-fives, and passes the Convention Center and the 16th Street Mall. The homestretch runs along 17th Avenue into City Park. The time limit is 3 hours 25 minutes. The event record for men is 1:03:05, set by Emad Bashir-Mohammed in 2025.