SM
Dec 5, 2026
5K
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ColderBOLDER 5K
The festive winter 5K on the CU Boulder campus, the spirited sister race to the BOLDERBoulder.
Verified listing
Source: official site
Updated today
Official registration linked
Race facts
Core planning details from the race record.
- Race date
- Saturday, Dec 5, 2026
- Location
- Boulder, Colorado, United States
- Distance
- 5K
- Price
- $32
- Registration
- Official registration linked
- Organizer
- BOLDERBoulder
Distances
5K
Planning timeline
- Registration opens
- Not published
- Registration closes
- Not published
- Race day
- Saturday, Dec 5, 2026
Not sure this race fits your season?
The race page stays free. Membership is the support layer for runners who want help deciding, training, and staying accountable once a race starts to matter.
- Before you register Talk through course fit, travel friction, timing, and whether this race belongs in your year.
- After you commit Use club rhythm to keep the training block moving after the exciting first week.
- When plans change Get a practical place to rethink the goal instead of dropping the plan silently.