Follow the greatest river in England for 184 miles from its source in the Cotswold hills to the sea. Passing through peaceful water meadows, unspoilt rural villages, historical towns and cities, and finally through the heart of London to end at the Thames Barrier in Greenwich.

There is an annual race along the 184 mile route, and currently FKTs are from the event.

David Cittadino submitted the route:

A loop from Adirondack Loj to the summits of Mt Gray, Skylight and Marcy.  About 18 miles.

Forward or reverse loop.  

See GPS tracking in the various FKT attempts for detailed directions.
 

An Indiana Dept. of Natural Resources 'challenge' to complete all 6 ravines of the Shades State Park. The lap is a linkup of most of the park's trails and the route is listed on a sign in the Hickory Parking lot.
https://www.in.gov/dnr/parklake/files/sp-6RavineChallengeBrochure.pdf