Running
Marathon
42.2 km
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Race month
November · 6°–11°
Field size
0–12,000
Surface
asphalt
Distances
42.2k, 21.1k
Distances
Running
Semi-marathon
21.1 km
Finish-time calculator
Your finish time
Slide to your target pace — and see when you’ll hit the line.
6:00
min / km
← faster · 2:0012:00 · easier →
4:13:10
Estimated finish · 42.2 km
10 km1:00:00
5 km30:00
Where am I when? · Splits
Start
0:00
5 km
30:00
10 km
1:00:00
15 km
1:30:00
20 km
2:00:00
Half
2:06:35
25 km
2:30:00
30 km
3:00:00
35 km
3:30:00
40 km
4:00:00
Finish
4:13:10
Estimates only · form, weather, and hills can change the result.
Course & climate
Typical weather in Boulogne-Billancourt
Monthly averages based on historical data (2000–present).
November
11°6°
- Sunrise
- 08:01
- Sunset
- 17:12
Surface mix
- 100% asphalt
What to expect
What makes this race distinct — for training and race day.
Le Semi-Marathon de Boulogne-Billancourt est une course à pied qui se déroule à Boulogne-Billancourt, en France. La course compte environ 12 000 participants et propose un parcours vallonné et pittoresque.
The field
0–12,000
Stay & get to the start
Getting there
Assumed starting point
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Estimating travel…
Hotels near the start
Route maps
Results
Official finisher lists are published by the race organiser.
View official resultsLast updated: Jun 9, 2026, 07:32:28 PM
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On your marks
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