Les Préautomnales is a nature-based race series held in early October, with all options designed as loops. The longest event is La Maratrail, a 42 km trail covering 1,000 m of elevation gain. Shorter trail options include L'Ecorchevache at 25 km with 500 m of gain, La Folletière at 15 km with 250 m, and La Mare Sangsue at 7 km.
The series also features two walking events: La Nordiabolique, a 15 km Nordic walk, and La Nordilettante, a 7 km walk. La Folletière attracts the largest number of participants, with over 300 runners in the last edition. Both L'Ecorchevache and La Mare Sangsue had more than 100 participants.