Nattland Backyard Ultra is a backyard-style ultramarathon held at Nordre Nattlandsfjellet in Bergen, Hordaland. Participants begin a 6.7 km loop at the top of each hour, completing it before the next hour commences.
The race structure incorporates pacing: a quicker lap allows for extended rest, refueling, gear changes, or preparation before the subsequent start. The event can extend up to twelve laps, targeting a total of 80.4 km, though participants may withdraw at any point they choose.