Bieg Cichociemnych is an obstacle cross-country race in Sochaczew, Poland, starting on ul. Podzamcze. Runners can select distances of approximately 5, 10, or 14 km, with youth races also part of the programme. This is not a simple park run; the route incorporates natural and artificial obstacles, and participants should anticipate mud, water, crawling, jumping, and confined taped sections.
The course runs along the bank and through the bed of the Bzura River, utilizing the river, marshy terrain, and muddy areas extensively. It honors the Cichociemni, the Polish Home Army paratroopers, and draws inspiration from special-forces training. UKS Dragon Fight Club organizes the event with the Mayor of Sochaczew, and local media regard it as a significant local sporting occasion: a blend of competition and a day of mud and water.