Osnabrücker PiesBERG-Ultra-Marathon (PUM)

The Osnabrücker Piesberg-Ultra-Marathon is an April trail ultra held in Osnabrück, Germany, focused on the Piesberg rather than a point-to-point route. The full PUM covers 59.5 km with 2,100 meters of elevation gain, and includes a distinct challenge: 3,396 steps. Participants begin early and have 11 hours to complete the course, making it a test of managing repeated climbs, stairs, and time constraints rather than simply covering a long distance. The full route consists of six laps, with a revised version designed for smoother running while retaining the Piesberg's steep character. A shorter alternative, the PUMelchen, allows participants to finish one lap early, covering 49.0 km, 1,750 meters of climbing, and 2,830 steps; this classification does not require a separate entry. The event has been held for approximately ten years, with one edition attracting 130 starters, 115 of whom finished. Local media refers to it as Osnabrück’s toughest run, fitting for a race where the key metrics include both elevation gain and thousands of stairs.