Coming in at 18 miles long, this is the longest rail-to-trail in the state,. After completion of the trail's second phase, it will expand to 36 miles. The first 18-mile leg takes you from Hargerhill in Johnson County to Toyalton in Magoffin County. Hikers, runners, cyclists and horseback riders traverse this trail, which goes through the 662-foot-long Gun Creek Tunnel, formerly the Dawkins Line railroad bed.