Saturday, November 7, 2026
· This weekend
Distance
Climb
Start Time
Cutoff
Terrain
Difficulty
Max Runners
The longest of the Berjatrail Siporex formats, run over a varied mix of paths and woodland tracks around Bourgoin-Jallieu with 480 m of climbing. The 16:45 start means part of the course is covered after dark under headlamp. An accessible race for runners used to longer distances, but demanding enough to be a real test.
Start and finish at the Stade Antonin-Berliat
Varied paths and woodland trails around Bourgoin-Jallieu
480 m of climbing over 24 km
Part of the route run after dark under headlamp
Aid stations at roughly km 6.5 and km 14 plus a finish-line spread
Start / Finish
Stade Antonin-Berliat, Bourgoin-Jallieu, Isère
Finish area in Bourgoin-Jallieu, with a finish-line aid station
Terrain
Route
Race Day
What to bring
Headlamp (frontale) for the night section
What you get
On the day
Before you enter
Other questions
Partly. The race starts at 16:45 and a section of the course is covered after dark, which is why it is billed as a semi-night event. A headlamp is essential.
The 24 km BUFF has 480 m of positive elevation gain and 480 m of descent.
Yes, the race is capped at 300 participants.
It is organised by CSBJ Athlétisme, the athletics club of Bourgoin-Jallieu.
Bourgoin-Jallieu, France
Saturday, November 7, 2026
More races like this one
€22
entry fee