Les 40 Bosses

Saturday, 5 December 2026

Le Monstre 120K

120km D+ 5500m

La Belle 75K

75km D+ 3300m

L'Historique 45K

45km D+ 2100m

La Classique 20K

20km D+ 900m

Le Sprint 10K

10km D+ 400m

Les 40 Bosses 2026: Registration

Les 40 Bosses is Paris's big winter trail: 10 to 120 km and up to 5,500 m D+ in the Montmorency forest, 25 km from the capital, on the first weekend of December.

Check official website

Registration not open yet

Visit official website ↗

Entry fees by distance

Distance	Elevation	Price
Le Monstre 120K120K	5,500m D+	Check website	Coming soon
La Belle 75K75K	3,300m D+	Check website	Coming soon
L'Historique 45K45K	2,100m D+	Check website	Coming soon
La Classique 20K20K	900m D+	Check website	Coming soon
Le Sprint 10K10K	400m D+	Check website	Coming soon

How to register

1
Go to the official race website using the registration button.
2
Select the distance you want to run.
3
Fill in the form with your personal details and federation license (if required).
4
Complete the payment and save your registration confirmation.

What's included in your entry?

Race bib with timing chip, aid stations along the course, accident insurance during the race, access to finish line services (physiotherapy, showers, finisher meal) and an event t-shirt or memento.

Registration not open yet

The organizer hasn't activated online registration yet. Check the official website to stay up to date on the opening.

Visit official website ↗

See full Pack 360 guide