The most recent edition on this page is dated May 25, 2026. The next edition date is not locked here yet. Use the historical race-morning weather on this page for planning until the next date is published.
10K
BOLDER Boulder 10K
Monday, May 25, 2026Boulder, Colorado, USA
Goal time
40:00
Adjusted time (preview)
About 68 m of climbing and 43 m of descent. Mostly flat.
Almost all within 2%2% over 6%Three climbs
Impacts
Based on the historical mean for the race window over the last 10 years, ±5 days.
Elevation
Heat
Wind
Total Impact
Race Pass: personalised finish time, adjusted splits, and your race-day pacing plan.
Related races
Same city, region or country, when we can resolve them. World majors also point to each other.
- Boulderthon
- Colorado Springs Marathon
- Denver Colfax Marathon
- Beach to Beacon 10K
- Cooper River Bridge Run
- Crescent City Classic 10K
- Crimson River Run 10K
- Monument Avenue 10K
View race map for this area.
Pacing and conditions FAQ
Beyond conditions
Conditions are only part of the race-day loss
Pacing mistakes often add several minutes, sometimes more than conditions alone, especially when the course and conditions are not ideal.
What your plan includes
Everything you need to turn this race preview into a usable race-day plan.
Personalized pacing
Effort and pace guidance tuned to this course profile.
Weather-adjusted splits
Split targets that account for heat, wind, and elevation.
Heat adaptation & drafting
Adjust for your heat tolerance and drafting preferences.
Get your personalised race plan for BOLDER Boulder 10K.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
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