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Boulder Reservoir

5565 N 51st St.
Boulder, CO 80301 United States
(303) 441-3461 https://bouldercolorado.gov/parks-rec/boulder-reservoir

October 2015

24 Hours of Boulder – Boulder 100

October 10, 2015 - October 11, 2015
Boulder Reservoir, 5565 N 51st St.
Boulder, CO 80301 United States

Team Relay, Solo Challenges, 6 Hour Nighttime Fun Run, 50K, 100K and 100 mile categories Race under the sun and stars in the running mecca of Boulder, Colorado. 24 Hours of Boulder is a series of endurance races that brings out the sense of adventure, stubborn determination and fun in every competitor! This thrilling format has been popular with bike races for years and is now available to runners! 24 Hours of Boulder is all-day and all-night. Runners can participate…

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July 2016

Star Spangled Splash 10K & 5K Run

July 4, 2016 @ 7:00 am - 5:00 pm
Boulder Reservoir, 5565 N 51st St.
Boulder, CO 80301 United States
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Race Features: Scenic USATF Sanctioned Course ​Run alongside scenic Boulder Reservoir FREE BOULDER BEER for all 21+ participants Free admission into the Boulder Reservoir ​Access to Rez games, beach and food vendors Accurately measured, clearly marked courses ​Professional run course support team​ Reliable, Accurate, Instant Timing & Results Awards for 1st, 2nd and 3rd Place Overall in 5K & 10K Local Sponsor Prize Giveaways throughout the day Sweet SWAG including:​ Men's & Women's Specific Tank-top Finisher Medal for all runners Race Distances: 5K Course…

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August 2016

COLORADO Recycled Run 10K & 5K

August 13, 2016 @ 7:00 am - 5:00 pm
Boulder Reservoir, 5565 N 51st St.
Boulder, CO 80301 United States
+ Google Map

The first ever Colorado Recycled Run will take place at the Boulder Reservoir this August. Offering discounted entry fees and sweet, recycled SWAG to all participants and finishers, this will be a Boulder favorite soon!  BBSC is bringing the recycled running concept to Boulder in August 2016. This anticipated race is geared towards recycling leftover race material from previous endurance events. Receive a deep discount, and walk away with a recycled race shirt and finisher medal. Plus, you'll experience the same quality course and our superb race…

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June 2020

Boulder Sunrise Triathlon

June 21, 2020 @ 6:00 am - 12:00 pm
Boulder Reservoir, 5565 N 51st St.
Boulder, CO 80301 United States
+ Google Map

If you enjoy smaller and less stressful wave starts, a well-marked course, and great SWAG, this is YOUR race! With a Sprint, Olympic, Duathlon, 10K and 5K Run, we guarantee a fun day for the entire family at the base of the spectacular foothills!

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July 2020

Tri Boulder

July 19, 2020
Boulder Reservoir, 5565 N 51st St.
Boulder, CO 80301 United States
+ Google Map

You asked for it, you got it! Introducing ‘The Beast’ long course triathlon, and aquabike to one of Colorado’s already most popular races. Tri Boulder also features an Olympic, Sprint, and Relay so we’ve got a distance to fuel everyone’s competitive spirit. Mark your calendars because this is a race you don’t want to miss!

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August 2020

Boulder Sunset

August 23, 2020
Boulder Reservoir, 5565 N 51st St.
Boulder, CO 80301 United States
+ Google Map

Join us at the Boulder Reservoir for the 12th annual Boulder Sunset Triathlon. A local favorite due to its later start, and will sell out in early August at 1,200 athletes. With a Sprint, Olympic, Duathlon, and 5K/10K runs, we guarantee a fun day for the entire family.

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September 2020

Boulder Rez Marathon, 3/4 Marathon, Half Marathon, 10K

September 5, 2020
Boulder Reservoir, 5565 N 51st St.
Boulder, CO 80301 United States
+ Google Map

Quickly becoming a Boulder classic! 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.

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