This spring race features a spectator-friendly Half Marathon, 10K and 5K course. Attracting athletes from all over the west due to its phenomenal scenery, glamorous finisher medals, perfect running temperatures with many nearby Boulder attractions to enjoy after the race. The run course loops around the Boulder Reservoir and remains mostly on dirt trails. The course is flat with only 200 feet of elevation gain. You will experience iconic views of the mountain range to the west. ​ The Half Marathon will complete 2 loops, and the 10K will complete one loop. 5K runners will take a different course route.
BOULDER REZ HALF MARATHON, 10K & 5K
April 13, 2024
Boulder
Trail
Ready to sign up?
100-500
Fast & Flat
Mountain Views
High: 57°
/ Low: 39°
Visit the race website for an up to date course description.
Overview
This spring race features a spectator-friendly Half Marathon, 10K and 5K course. Attracting athletes from all over the west due to its phenomenal scenery, glamorous finisher medals, perfect running temperatures with many nearby Boulder attractions to enjoy after the race. The run course loops around the Boulder Reservoir and remains mostly on dirt trails. The course is flat with only 200 feet of elevation gain. You will experience iconic views of the mountain range to the west. ​ The Half Marathon will complete 2 loops, and the 10K will complete one loop. 5K runners will take a different course route.
Course Description
Visit the race website for an up to date course description.
