Semi-Marathon de Boulogne-Billancourt Christian Granger 2026

The Semi-Marathon de Boulogne-Billancourt Christian Granger is a November half marathon held in Boulogne-Billancourt, a commune in the Hauts-de-Seine department near Paris. This road race covers the standard 21.1 km distance, and it is the sole event offered, without a full marathon option. The race attracts several thousand participants annually and welcomes both novice and seasoned runners, giving it the feel of a significant local competition rather than a specialized elite gathering. The course is a loop starting and ending at the town hall. Participants run clockwise along the Seine, passing Sèvres - Cité de la céramique and the Pont de Saint-Cloud, before heading north towards Longchamp Racecourse. A brief stretch through the Bois de Boulogne leads to the halfway point, after which the route reverses, following the river south back to the town hall finish. The name reflects the affectionate local identity of Boulogne-Billancourt, sometimes called Boulbi, aligning with a race centered on the town itself rather than a tour of the broader Paris region.