Le Castor Fou
Trail Running covering 13 km to 22 km in Vauhallan (Île-de-France, France)
Le Castor Fou is an endurance sporting event in Vauhallan, Île-de-France, FR focused on Trail Running. Key features include Nature & Off-Road, City Run.
The race program comprises 2 competitions, including Trail 22 km (22 km, +572 m D+), and Trail 13 km (13 km, +338 m D+). The exact date for the next edition is currently open and will be announced by the organizer. Official race regulations, course details, and registration information are provided on the organizer's website (esv91.com).

Event characteristics
Races & distances (2)
| Competition | Discipline | Distance | Elevation gain | Altitude range | Course type | Course & profile |
|---|---|---|---|---|---|---|
| Trail 22 km | Trail Running | 22 km | +572 m | 105 m - 345 m | Loop course | Route & profile |
| Trail 13 km | Trail Running | 13 km | +338 m | 108 m - 250 m | Loop course | Route & profile |
Course route & map
Elevation profile & course telemetry
Altitude from 105 m to 345 m above sea level (+572 m D+, -572 m D-)
Elevation profile & course telemetry
Altitude from 108 m to 250 m above sea level (+338 m D+, -338 m D-)
Frequently asked questions (FAQ)
When and where does Le Castor Fou take place?
Le Castor Fou takes place in Vauhallan, Île-de-France, FR (start area at coordinates 48.7342° N, 2.2074° E). The exact date for the next edition is currently open and will be announced by the organizer.
What races and distances are offered at Le Castor Fou?
The race program comprises 2 competitions, including Trail 22 km (22 km, +572 m D+), and Trail 13 km (13 km, +338 m D+). The competitions belong to Trail Running.
What is the course layout and elevation profile for Le Castor Fou?
The main competition (Trail 22 km over 22 km) is designed as a loop course featuring +572 m of elevation gain and -572 m of elevation loss, ranging between 105 m and 345 m above sea level. An interactive course map with route visualization, elevation profile, and GPX export is available in the course section on this page.
Where can I find registration and official race rules for Le Castor Fou?
Official race regulations, course details, and registration information are provided on the organizer's website (esv91.com).