The Spring Boulder Rez Half Marathon, 10K and 5K is quickly becoming a Boulder favorite! And, the incredible Colorado weather in the end of May couldn’t be better for hitting your new PR. Athletes travel from all over the US to run on this phenomenal course, with views of the Flatirons painted in the distance. Bring your friends and family to cheer you on, this is a spectator-friendly course. All participants will receive a glamorous finisher medal and cool shirts!
This amazing run course around the Boulder Reservoir is astonishing and remains mostly on dirt roads and trails. The course is flat with only 200 feet of elevation gain. The route will take you around the the Boulder Reservoir, where 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 run counterclockwise for 1.55 miles and then head back to the finish line in the parking lot area
Aid Stations will be stocked with water and depending on COVID restrictions athletes may be required to bring their own cups and fill with our hands free coolers.
Remember, the Half Marathon course makes 2 laps around the Rez, so you will hit these aid stations multiple times during the Half Marathon.
6:00am - 7:40am: Race Day Packet Pick-Up
6:45-7:00am: Start of the Half Marathon
7:05-7:20am: Start of the 10K
7:25-7:40am: Start of the 5K
8:25am: 5K Awards
8:45am: 10K Awards
9:00am: Half Marathon Awards
10:45am: Course Closes
Sunday, June 6th
Race Morning packet pickup will be 6am - 7:40am
at the Timing Trailer in Boulder Reservoir parking lot
Scenic, USATF sanctioned course
Accurately measured, clearly marked courses
Timing & Immediate Race Results