Dordtse Biesbosch Trailrun 2026

The Dordtse Biesbosch Trailrun begins and ends at the organizer's grounds on Schenkeldijk in Dordrecht, South Holland. This trail race crosses the Nieuwe Dordtse Biesbosch, offering distance options from short Family Runs to a half marathon. Participants can select 3 km or 5 km Family Run courses, a standard 5 km, 10 km, 10 English Miles, or a 21.1 km half marathon, catering to children, novice runners, and those seeking a longer off-road challenge. The courses feature narrow paved paths, unpaved tracks, sandy stretches, and dikes, leading through the Nieuwe Dordtse Biesbosch, the floodplains beside the Nieuwe Merwede, and the Elzenbos. The trail surface may present puddles, streams, branches, and tree trunks, making the race a test of adaptability to varied terrain rather than a pursuit of speed on a smooth road. The start-finish area provides baggage drop-off and changing facilities. The event maintains a relaxed outdoor atmosphere with campfires, marshmallow roasting for children post-race, and refreshments including coffee, tea, soft drinks, satay, and beer.