The Randonnée du Téléthon in Porcheville is a road cycling event held in late November. It begins at 15 bis rue des Pressoirs in Porcheville. Participants can select from two routes through the Vexin region: a 27 km option or a 45 km option. The registration fee is 6 euros.
The event marks the end of the local cycling calendar for the year, offering a concluding ride before winter sets in, rather than a competitive race. The organizers focus on a practical and welcoming atmosphere, providing coffee or hot chocolate at the start, hot soup at a mid-ride stop, and a hot dog upon completion.