Romeriksåsen på langs is a 50 km forest ultra in Romeriksåsen, starting at Brovoll on the E16 between Nannestad and Roa, and finishing at Veståsen school in Gjerdrum. The route includes approximately 1,000 meters of climbing, which is moderate for its distance. This makes it a suitable first ultra for runners seeking distance without a significant mountain elevation gain.
Most of the course is off-road, with 36 of the 50 kilometers on trail and the remainder on gravel. Participants can anticipate authentic forest running, featuring technical trails, some boggy areas, and sections that may become wet and challenging after rainfall. Romerike Ultraløperklubb organizes the event, staffing two aid stations and operating a morning bus from the finish to the start.