Races 10K · Boulder, USA
Bolder Boulder 10K
Bolder Boulder 10K is a rolling 10K in Boulder, USA, held each May. Memorial Day tradition at 1,600m altitude — rolling streets into a packed stadium finish. Late May is 8-18C; thin air is the story. The rises around Boulder are small but relentless — train on similar terrain and race by effort, not pace.
Last updated 2026-07-03 · confirm dates & entries on the official race site
When
May
every year
Course
rolling
10K
Conditions
Late May is 8-18C; thin air is the story.
Racing this course well
Memorial Day tradition at 1,600m altitude — rolling streets into a packed stadium finish.
The rises around Boulder are small but relentless — train on similar terrain and race by effort, not pace.
Pick your goal for Boulder
Pace charts, weekly structure and timelines for the most common 10K goals:
Asked often
- When is the Bolder Boulder 10K?
- It is held each May in Boulder, USA. Check the official Bolder Boulder 10K site for the exact date and entry windows.
- Is the Bolder Boulder 10K course flat?
- Memorial Day tradition at 1,600m altitude — rolling streets into a packed stadium finish.
- How should I train for the Bolder Boulder 10K?
- Build for the course you'll actually race at the Bolder Boulder 10K: rolling terrain, May conditions. RunV generates a plan for your goal time and rebuilds it every time life interrupts the Boulder build.
Not sure what to target? Predict your 10K time from a recent race →
More 10K races
Build for Boulder — around your actual life
RunV engineers your block backwards from race day in May — and rebuilds it every time training doesn't go to script.
