Brotorp Trailrun begins and ends at Brotorpsstugan, the clubhouse of Skogsluffarnas OK, located at Skarpnäcks gårdsväg 100, south of Stockholm. This trail race is structured around a technical 7 km loop. Adult distances include 7 km, 14 km, and 21 km, with a children's course of approximately 2 km. The race begins at 10:00. Bib pickup is available on race day at Brotorpsstugan; participants should arrive at least one hour before their scheduled start.
The loop crosses Nackareservatet, following paths alongside lakes, over hills, and through challenging terrain with roots and stones. The 14 km race consists of two laps, and the 21 km race involves three laps, allowing participants in longer distances to navigate the technical sections multiple times. Skogsluffarnas OK organizes this as a demanding yet welcoming local trail event. All participants receive food upon completion.