The Tour des étangs de Cergy is an urban trail race held in mid-January in Cergy, located in the Val-d'Oise department of Île-de-France. Participants can select either a 10 km or an 18 km distance, positioning the race as a choice between a shorter park run and a more extended trail excursion, distinct from a typical road race through urban streets.
The courses traverse a public park, winding along the lakes and ponds that lend the event its name. ADEOCHRONO manages the timing, and the event provides app-based live GPS tracking along with a fan zone, enabling supporters to monitor participants' progress in real time.