L’Alphonsine and Alphonsinette invite participants to meet on Sunday, October 11, 2026, from 9 a.m. to noon, at the sports complex on the Île des Impressionnistes in Chatou, in the Yvelines. The 17th edition, open to women and girls, is part of Pink October: all registration fees are donated to the charity Aidons la recherche, which supports women affected by breast cancer.
Registrations are closed and no on-site sign-ups will be accepted, the organizers' site announces. For those already registered, bib pickup will be held exclusively on Saturday, October 10, from 9:30 a.m. to 1:00 p.m., at the gymnasium on Île des Impressionnistes.
Three starts set the morning pace: the Alphonsinette, a 2 km course for girls aged 8 to 13, begins at 9:15 a.m., just like the 5.65 km hike. The relaxed-paced run, over the same distance, kicks off at 10 a.m. A mother-daughter duo format is also on offer; the city specifies an age range of 14 to 18 for the girls in this duo, and access from 16 years old for the older participants’ events.
Group warm-ups are scheduled at 9:00 a.m. and 9:45 a.m. with the SAMC judo association. A partner village and a raffle round out this Seine-side event. The prices announced for this edition are €10 for the race or the hike, €10 for the mother-daughter duo, and €5 for the Alphonsinette.
Dates and Opening Time
On October 11, 2026
Location
Impressionist Island
Île des Impressionnistes
78400 Chatou
Route planner
Accessibility info
Official website
croissy.chatou.athle.free.fr
