Leśna ZaDyszka in Szulmierz is a trail running event held at Leśniczówka Szulmierz in the Regimin commune, near Ciechanów in Mazowieckie. The event features 10 km and 5 km runs, children's races, and a cross duathlon, offering multiple options beyond a single road race.
The courses follow forest paths within the Szulmierz Forest, with minimal asphalt sections. Stowarzyszenie “ZaDyszka” organizes the event, aiming to encourage participation in running, cycling, and outdoor activities, while also highlighting the local area and its tourism potential.