Colorado Multisport Calendar


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Boulder Rez Marathon

August 12

BBSC Endurance Sports

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.

Marathon, 3/4 Marathon, Half Marathon, 10K, Relay


Boulder Reservoir
5275 Reservoir Road
Boulder, CO 80301 United States
+ Google Map
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Without Limits Productions


BlueSeventy Wetsuits


Longmont Try a Tri Harvest Moon Triathlon Oktoberfest Triathlon