Boulder Rez Marathon
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Boulder Rez Marathon 2026
The event takes place at Boulder Reservoir in Boulder, Colorado (80301). The running course follows the reservoir shoreline and is routed mostly on dirt roads and trails. The route is relatively flat, with about 200 feet of total elevation gain, and offers views of the Boulder Reservoir and the Rocky Mountains.
Distances and entry types offered at the event include:
- 10K Run
- Half Marathon
- 3/4 Marathon
- Marathon
- Marathon Relay (captain and member entries)
The event program includes packet pick up and registration, awards presentations, and a course closure later in the day. The race is organized by BBSC Endurance Sports. Pricing and availability vary by distance and entry type. Visit the organization's website for the most recent information.
