boulder rez half marathon

Boulder Reservoir, boulder, Co

june 6, 2021

Boulder Rez Half: race details

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!

Boulder Rez Half: race details

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
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.

Event Schedule
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

Packet Pick-Up
Sunday, June 6th
Race Morning packet pickup will be 6am - 7:40am
at the Timing Trailer in Boulder Reservoir parking lot

Race Features
                                         Scenic, USATF sanctioned course
Accurately measured, clearly marked courses
Timing & Immediate Race Results
Participant Shirt
Finisher Medal

Boulder rez half: Pricing

Distance1/1-4/28through 6/4through 6/6
Half Marathon$80$90$90
Half Marathon Relay$105$115$115

Boulder Rez Half: Packet Pick Up

2021 Dates & Times TBD​
Sunday, June 6th


Boulder Reservoir Parking lot

Boulder Reservoir, CO

Boulder Rez Half: sponsors

register now

The Boulder Rez Half - June 6, 2021


SKU: Boulder Rez Half 2021 Category:

Additional information

Race Type

10k, Half Marathon, 5k, Half Marathon Relay (Captain), Half Marathon Relay (Team Member)


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boulder rez half: course Map

scenic running perfected.

we care about your safety

We want you to feel confident when registering for a BBSC race and those already registered can have peace of mind knowing you have options and will not lose any portion of your race entry. We believe our COVID-19 transfer policy is the best in the industry, going above and beyond for the athletes who choose to race with us.
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