Ultranaut Running's No Business Hundred is a trail endurance race that begins and ends at the abandoned coal mining town, Blue Heron, just east of Stearns, KY. The course is a single 100 mile loop that traverses through the heart of the Big South Fork National River & Recreation Area across the state line into Tennessee and back on some of the oldest trails in the southeast.

Along the way participants will pass through towering sandstone arches & rockhouses, gaze upon spectacular overlooks & waterfalls, and visit abandoned farms and homesteads including the No Business settlement. This epic journey is an adventure through some of the most scenic and wild areas in the region.

With nearly 15,000 ft of climbing and 15,000ft of decent, combined with the technical terrain make the No Business 100 a challenging and unique hundred mile course.