There is a grand plan to build a 100-mile shared use, non-motorized path planned to encircle the city and link neighborhoods. A completed section, wonderful for running, is a 19-mile north-south greenway built by The Parklands, connecting four parks: Beckley Creek Park, The Strand, Turkey Run Park, and Broad Run Park. The path runs through a combination of forest, meadow, and lawn. The area is 20 miles west of Louisville.
Some of the best sections of this greenway for running are the Humana Grand Allee, a series of paths, trails, and boardwalks in Beckley Creek Park. There are also some wonderful sections in The Strand, along the water.
Basically, follow “Louisville Loop” signs for the main path. There are all sorts of trails that come off the main path, for exploring.