5565 N 51st St., Boulder, CO
The Boulder Rez Marathon is a Running race in Boulder, Colorado consisting of a Half Marathon and Marathon and 10K and 5K.
The Boulder Rez Marathon is 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 Rez on some awesome single tracks, a packed-dirt trail on the dam, and paved Reservoir Roads. This race will sell out at 1,000 participants, so register early to guarantee a spot in the race!
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