Running
Marathon
42.2 km
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Race month
May · 43°–69°
Field size
50,000
Surface
asphalt
Distances
42.2k, 21.1k, 16.1k, 5k
Distances
Running
Marathon Relay
42.2 km
Running
Half Marathon
21.1 km
Running
Urban 10 Miler
16.1 km
Running
5K
5 km
Finish-time calculator
Your finish time
Slide to your target pace — and see when you’ll hit the line.
6:00
min / km
← faster · 2:0012:00 · easier →
4:13:10
Estimated finish · 42.2 km
10 km1:00:00
5 km30:00
Where am I when? · Splits
Start
0:00
5 km
30:00
10 km
1:00:00
15 km
1:30:00
20 km
2:00:00
Half
2:06:35
25 km
2:30:00
30 km
3:00:00
35 km
3:30:00
40 km
4:00:00
Finish
4:13:10
Estimates only · form, weather, and hills can change the result.
Course & climate
Typical weather in Denver
Monthly averages based on historical data (2000–present).
May
69°43°
- Sunrise
- 05:46
- Sunset
- 20:08
Surface mix
- 100% asphalt
What to expect
What makes this race distinct — for training and race day.
The Cigna Denver Colfax Marathon is a two-day festival with eight races, featuring the iconic Colfax Avenue corridor through downtown Denver and the City Park finish. It is the largest marathon weekend in the Rocky Mountain region.
The field
50,000
Catering & aid stations
On-course aid stations/Verpflegung along the course; not Pacemaker lines (dietary needs and on-course refreshment stands detailed in participant info).
Pacers
Pacer Pacemaker information is not currently available in the source materials; see official participant pages for target times per start wave.
What does it cost?
What's included in entry
- Race bib
- Event T-shirt
- Raffle ticket for awards
- Finisher medal
- Post-race festival with food & beverage in City Park
Stay & get to the start
Getting there
Assumed starting point
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Estimating travel…
Hotels near the start
Results
Official finisher lists are published by the race organiser.
View official resultsLast updated: Jun 5, 2026, 11:51:38 PM
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On your marks
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