October ultramarathons in Kentucky, United States

Rural Kentucky park and fairgrounds loops with small-town scenery and last runner standing format

Technical 100-mile single-loop crossing Tennessee and Kentucky, over 14,500 feet of elevation gain, sandstone arches, waterfalls, historic settlements, remote, 

Out-and-back 50K on the historic Bike & Hike Trail: crushed gravel, quiet woods, and a handful of climbs and descents in Mammoth Cave National Park.