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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • Half Marathon
  • 21.1 km
  • Denver
  • Event dates –
  • Open entry

Denver Colfax Marathon Half Marathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2027 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

View verified GPS mapOfficial event website & entry ↗
Plan my trainingPlan my paceData current as of

Decision summary

Denver Colfax Marathon Half Marathon at a glance

Cut-off average pace
9:43/km

3:25:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.

Typical conditions
81/100

Historical race-date favourability, not a forecast

Evidence depth
21 verified facts

Stored GPS route

Quick answers

What runners ask first

Denver Colfax Marathon Half Marathon route map

raceindex.org has a GPS course file for Denver Colfax Marathon Half Marathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.

Where does the Denver Colfax Marathon Half Marathon route go?

The Denver Colfax Marathon Half Marathon route starts at Denver's City Park, east side of Ferril Lake; finishes in City Park. Underfoot, expect a road course. The setting includes city and parkland. Urban 10 Miler covers the final 10 miles of the marathon course, starting at the Rocky Mountain College of Art + Design (RMCAD) campus and finishing in City Park (2.5-hour limit).

What should runners know on race day for the Denver Colfax Marathon Half Marathon?

Post-race party in City Park features live music, food and drinks on the lake.

Race character

Scenery

  • City
  • Parkland
  • Countryside
  • Mountain
  • Waterfront
  • Lakeside
  • Riverside
  • Historic

Terrain

  • Road

Entry, logistics and records

Records and field

Field size
More than 25,000 runners across the race weekend

Entry requirements

Entry status
Open entry: The held registration model is open entry and this edition is not marked sold out.
Cut-off
3 hours 25 minutes

Race day logistics

Expo / packet pickup
Two-day Cigna Denver Colfax Marathon Health & Fitness Expo held at Empower Field at Mile High; race packets and bibs collected at the expo
Race village
No
On-course music
Post-race party in City Park features live music, food and drinks on the lake

Access and course status

Start
Denver's City Park, east side of Ferril Lake; finishes in City Park

Course facts

Notable features
  • Includes the nation's largest marathon relay, with Corporate, Government, Public School Teachers and Open divisions. Charity Partners Program has worked with 700+ charities, one of the largest race nonprofit platforms in the country, with a reported $10 million impact on the local nonprofit community. RTD transit tickets provided to participants
  • Urban 10 Miler covers the final 10 miles of the marathon course, starting at the Rocky Mountain College of Art + Design (RMCAD) campus and finishing in City Park (2.5-hour limit)
  • passes Empower Field at Mile High, downtown Denver, Confluence and Cherry Creek, and 17th Avenue
  • Only race to run through the Denver Zoo and the only race in the country with a fire-station run-through
  • passes the State Capitol, Civic Center Park, 16th Street Mall, Convention Center, Cathedral Basilica and Voodoo Doughnut

What are typical race-day conditions?

  • 12°CTypical temperature
  • 19 kphTypical wind
  • 4 mmTypical rainfall
  • 81Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (2)

Read the full methodology →