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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 2018

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

October 7
Boulder Reservoir, 5565 N 51st St.
Boulder, CO 80301 United States
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Boulder’s biggest marathon due to its early October date, which brings out the best running temperatures of the year. This popular course will take you around the reservoir, awesome singletracks, a packed-dirt trail on the dam, and paved roads.

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