Denver Colfax Marathon

Race Date

May 17, 2026

Location

Denver, CO

Logistics

Race Day

Sunday, May 17, 2026

Start Time

TBA

Start Location

Denver, CO

Directions

Course Info

USATF Certified

Terrain

road

Elevation Gain

Net Drop/km

0 m (Flat)

Separation

0.2%

Also Offers

26.2M10M run | 26.2M relay

USATF Certified Course

CO23004DT · Colfax Half Marathon

Relatively flat with minimal net elevation change. Loop course — start and finish are close together.

Race Day Weather

5-year historical avg

Start (Low)

45°

Afternoon (High)

72°

Warm — hydration strategy is key, start conservatively

0.1"

Precipitation

12 mph

Wind

56%

Humidity

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