Denver Colfax Half Marathon 2026: Route Map & Course Guide

The Denver Colfax Half Marathon 2026 starts and finishes at Ferril Lake within City Park, per the Half Marathon Course Overview. The course keeps the mile in Denver Zoo, and the organizer's Full Course Map shows the Colfax courses running through Denver and Lakewood.

The race starts and finishes at Ferril Lake within City Park, according to the course overview. Start and finish share one place, so a single arrival point covers both. Parking, weather and water are worth checking with the organizer before race morning.

The Full Course Map shows the Colfax courses running through Denver and Lakewood.

The map page carries the line "Check out the 2026 Map – including the zoo mile!" The course overview says the new course keeps the mile in Denver Zoo. To trace each turn, open the map and follow the 2026 course line.

The Registration page lists individual registration for the Marathon, Half Marathon, Urban 10 Miler and Colfax 5K. The relay has its own separate registration, and the page also has a section for people entering more than one race.

The Half Marathon page lists the full series: Marathon, Half Marathon, Urban 10 Miler, Marathon Relay and Colfax 5K. Each distance has its own guide:

• Marathon
• Marathon Relay
• 5K
• 10 Miler

Where does the Colfax Half Marathon start and finish? At Ferril Lake within City Park, per the course overview.

What is the zoo mile on the Colfax Half Marathon course? The course overview says the new course keeps the mile in Denver Zoo, and the Full Course Map promotes the 2026 map "including the zoo mile."

How do I register for the Denver Colfax Half Marathon 2026? Use the organizer's Registration page, which lists individual entry for the Half Marathon alongside the other distances.

Which distances are in the Colfax race series? The Half Marathon page lists the Marathon, Half Marathon, Urban 10 Miler, Marathon Relay and Colfax 5K.

Updated 2026-10-14: merged the thin date section into the Ferril Lake start section, removed the first-person FAQ sentence and unsourced Capitol Hill claim, and combined registration with the other distances.