Foulées osnyssoises

The event titled "Foulées osnyssoises" returns for its 30th edition on 24 May 2026, featuring a new 21 km urban trail alongside shorter distances for juniors and adults. The programme includes youth-focused races (800 m and 1500 m) and adult distances (5 km, 10 km and 21 km), making it an inclusive local running festival. The organisers highlight a varied route that crosses all Osny districts with a mixed rural, wooded and urban profile, emphasising soft-path sections and the Jules César roadway.

Parc de Grouchy serves as the central hub with packet pickup on 22–23 May and a race-day collection window on the morning of the event; staggered starts take place from 09:00 with most longer distances starting at 09:30. The event notes an operational safety plan requiring 70 marshals for 2026 and provides local access and parking guidance (A15 exit n°11 and nearby public parking). Entrants are directed to register via ledossard.com during the announced registration window.