A simple concept: Run across the state from the furthest western to furthest eastern part of the state. 

"My thinking was any future attempt just has to be from Arkansas/TN state line at Memphis foot bridge to the Eastern tip of TN 300 ft off the Virginia Creeper trail outside of Damascus VA. As long as the runner covers 1000k the exact course doesn’t have to be replicated. For instance Laz has a different course mapped out for a virtual run."

621.75 miles (1,000.6 kms); 10,193' gain, 7,511' lost (W-E)

https://www.rheingau.de/wanderwege/gebueck

A 1575m summit in the Allgäu alps, at the top of the ski area by Nesselwang.  The FKT route is from the church of Nesselwang to the summit of Alpspitze and back.

https://www.allgaeu-ausfluege.de/07alpspitze.htm