Black River Trail Classic

Black River Trail Classic takes place in Millston, Wisconsin, on October 17, 2026. Four trail distances are staggered through the morning: the 85K (53 miles) at 5 a.m., the 50K (31 miles) at 7:30 a.m., the 25K at 9:30 a.m. and the 10K at 10:30 a.m. The staggered starts mean the whole field converges on the finish through the middle of the day.

That range gives a group of friends or a family real flexibility, since everyone runs the same event on the same morning at very different commitments. The 10K and 25K work as an introduction to trail racing for road runners, the 50K is the classic first ultra, and the 85K is a serious step up that deserves a 16-week build with long runs on soft, rolling forest ground. Mid-October in western Wisconsin means dressing for a cold pre-dawn start.