Boulder Rez Marathon

Boulder Reservoir, Boulder, Colorado

August 12th 2023

Boulder Rez Marathon: race details

Saturday, August 12th, 2023
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.
Register Now2022 Results


Half Marathon$60$70$80$90
3/4 Marathon$70$80$90$100
Marathon Relay$110$120$130$140
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

Friday, August 11th
Arvada Triathon Company
14715 W 64th Ave, Arvada, CO 80004

Race Day Packet Pickup
Saturday, August 12th
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: course Maps

scenic running perfected.
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