Ultra Duch Sanu is a cycling ultramarathon held in Stężnica, a village within the Bieszczady Mountains of south-eastern Poland. Participants select either gravel or road categories: Gravel 270, Gravel 145, Szosa 300, and Szosa 145. The series offers both off-road cycling and long-distance road racing.
The event begins and concludes in Stężnica. The Bieszczady landscape provides a mountain setting, distinct from a city-course atmosphere. The source identifies this as the first edition of Ultra Duch Sanu, with Max Elektro noted as an event supporter.