Katsig Bakker Trail Race is held in a nature area 10 km west of Frederikshavn. The course features hilly terrain with old beech forest, heather hills, and a forest lake. The race utilizes small paths and roads, clearly marked with flags. Each loop is 4 km with 162 meters of elevation gain. Participants can complete up to 7 loops within a 3-hour time limit, allowing them to choose their total distance and elevation. Walking is also permitted. A refreshment station is located at the finish and at the start of each new loop. All participants receive a sandwich, a drink, and a medal upon finishing. The entry fee is the same regardless of distance, and registration is limited to 100 participants.