Denver Colfax Half Marathon

Denver, CO|Sunday, May 17, 2026|15 days ago
::
:

Weather

Actual
TimeTempDew PtHumidityWindConditions
Start54°F42° Ideal63%1 mph NEClear sky
8:00 AM57°F41° Ideal56%2 mph EClear sky
Finish61°F37° Crisp40%3 mph SEPartly cloudy

Elevation Profile

Loading map…

Course Stats

Net Elevation
+0 ft
Distance
13.11 mi
Total Gain
+473 ft
Total Loss
-473 ft
Max Grade
14.0%
Altitude (+0.2%)
5,262 ft

Mile Splits

MileGrade
1+1.2%
2-0.1%
3-0.9%
4+0.8%
5-0.3%
6-1.1%
7-0.2%
8+0.2%
9+0.1%
10+0.5%
11-0.4%

Denver Colfax Half Marathon Pace Calculator & Race Plan

The Denver Colfax Half starts and finishes at City Park, passing through downtown, the State Capitol, and the Denver Zoo. About 350 feet of gain at 5,280 feet of altitude. The thin air makes this course run harder than the modest elevation profile suggests.

May in Denver is usually great for running. Our model accounts for the altitude effect on pace and the gentle terrain.