Boulder Rez Marathon

Boulder Reservoir, Boulder, Colorado

August 14th 2021

Boulder Rez Marathon: race details

Saturday, August 14th, 2021
7:15am - 2:00pm
5565 51st St, Boulder, CO 80301
Boulder Reservoir, CO

This amazing run course will take you alongside the Boulder Reservoir, remaining mostly on dirt roads and trails. The course is flat with only 200 feet of gain, and will provide views of the Boulder Reservoir and Rocky Mountains.
My Race ResultsRunner Information Guide


Half Marathon$60$70$80$90
3/4 Marathon$70$80$90$100
Marathon Relay$105$115$125$135
Event Schedule
6:00am - 7:30am: Packet Pick Up & Registration
7:15am: Start of Marathon
7:20am: Start of the 3/4 Marathon
7:25am: Start of the Half Marathon
7:30am: Start of 10K
8:45am: 10K Awards
9:30am*: Half Marathon Awards
10:30am*: 3/4 Marathon Awards
11:30am*: Full Marathon Awards
2:00pm: Course Closed
*Award times are approximate

Packet Pickup
Road Runner Sports Westminster
Friday, August 13th
10442 Town Center Dr Suite 300, Westminster, CO 80021

When you stop by Road Runner Sports to pick up your bib, why not pick up a few things for the race? All 1st time VIP Family Members will receive $10 in Rewards Cash to use immediately for purchases. Current VIP Family Membership will receive DOUBLE REWARDS Cash.

Race Day Packet Pickup
Saturday, August 14th
Finish Line Area in Boulder Reservoir Parking Lot

Race Features
Scenic, USATF sanctioned course
Early & Race Day Packet Pick Up Options
Accurately measured, clearly marked courses
Reliable, Accurate Results
Participant Shirt
Finisher Medal

Overall Top 3 Male & Female
Age Groups: 19 & Under; 20-29; 30-39; 40-49; 50-59; 60-69; 70-79; 80+

Volunteers of all ages are welcome! Volunteers under 13 years must have a parent or guardian accompanying them during their volunteer shift. Please email to inquire about volunteering. Include your name, age, day and time availability, and any special requests.

Boulder Rez Marathon: sponsors

Boulder Rez Marathon: course Maps

scenic running perfected.
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