From the https://www.knobstonehikingtrail.org/ :The Knobstone Hiking Trail is a 160-mile trail along the landmark Knobstone escarpment in one of the most rugged and scenic areas of the South Central Midwest, on the high bluffs of the forested corridor between Indianapolis, Indiana and Louisville, Kentucky. The KHT consists of four sections, Knobstone (south, 45 miles), Pioneer (South middle, 37.9), Hoosier National Forest (North middle, 28.4), and Tecumseh (north, 42.7-miles). The Knobstone has continuous trail from start to finish. The Tecumseh and Hoosier National Forest has minor county road walks. The Pioneer has 5 miles of existing trails with approximately 9 more miles in various stages of development. The extended road walks are nearly all on remote gravel and black top roads with great scenery. There is 2.5 miles of road walk along Hwy 135 with a wide grass strip at the edge. There is good access and parking at 10-20-mile intervals, ideal for day hikes and backpack camping. No fees, reservations, or permits are required.