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Borås Ultramarathon Bum
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Seskarö Trailrun
Seskarö, SE
Black River Run, 100 miles
Saturday, September 19, 2026 · Västmanland, Sweden
Distances
16.1km
32.2km
48km
50km
80.5km
160.9km
161km
About this race
Black River Run is an urban ultra in Västerås, Sweden, with the 100-mile race covering approximately 161 km. The event takes place in September and also includes shorter distances: 50 miles, 48 km, 32.2 km, and 10 miles. This setup allows both long-distance ultra runners and participants seeking a shorter trail run to compete on the same day.
Everything centers on a varied 10-mile lap. This lap begins, winds through, and concludes at Västerås SOK's clubhouse, Orientalen. The course incorporates technical trails, jogging paths, hiking routes, gravel roads, and some asphalt sections. All finishers receive a medal, and anyone completing the 100 miles in under 24 hours is awarded a buckle. Västerås Löparklubb organizes the race, and the start/finish area provides changing rooms, showers, and a sauna.
Start location
Västerås SOKs klubbstuga Orientalen
Västmanland, Västmanland