Races Half marathon · Boulogne-Billancourt, France
Semi de Boulogne-Billancourt
Semi de Boulogne-Billancourt is a flat half marathon in Boulogne-Billancourt, France, held each November. The season-closing fast half on Paris's western edge — flat laps built for PBs. Mid-November is 4-10C. Flat courses like Boulogne-Billancourt's reward metronomic pacing — the danger is going out faster than goal pace because it feels cheap early.
Page rebuilt 2026-10-01 · race facts not independently verified — confirm dates and entries on the official race site
When
November
every year
Course
flat
Half marathon
Conditions
Mid-November is 4-10C.
Racing this course well
The season-closing fast half on Paris's western edge — flat laps built for PBs.
Flat courses like Boulogne-Billancourt's reward metronomic pacing — the danger is going out faster than goal pace because it feels cheap early.
Pick your goal for Boulogne-Billancourt
Pace charts, weekly structure and timelines for the most common half marathon goals:
We don’t hold a confirmed date for this edition, so any countdown comes from the date you enter here.
Build your training around Semi de Boulogne-Billancourt.
RunV works backwards from race day to today and rearranges the weeks when life interrupts. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the Semi de Boulogne-Billancourt?
- It is held each November in Boulogne-Billancourt, France. Check the official Semi de Boulogne-Billancourt site for the exact date and entry windows.
- Is the Semi de Boulogne-Billancourt course flat?
- The season-closing fast half on Paris's western edge — flat laps built for PBs.
- How should I train for the Semi de Boulogne-Billancourt?
- Match your preparation to Semi de Boulogne-Billancourt's profile and the November weather, then protect consistency — RunV's adaptive plan recalibrates after every run so one bad week never derails the block.
Not sure what to target? Predict your half marathon time from a recent race →
More half marathon races
Build for Boulogne-Billancourt — around your actual life
RunV engineers your block backwards from race day in November — and rebuilds it every time training doesn't go to script.
