Likely the most popular running route in all of Japan.  Some races have been held, and likely there have been some very fast times.  Note that runners must go counter-clockwise.

https://en.japantravel.com/tokyo/the-imperial-palace-running-route/45840

Here is a Strava segment:  https://www.strava.com/segments/2446656  (Current CR's are 15:35/Male; 18:16/Female, out of 13,494 runs).

The McMillan track is a 220km walk traversing the southern end of the Victorian Alps in Australia.

The historic track follows the footsteps of Angus McMillan who, in 1864, set out to cut a track to link the goldfields together in the Gippsland region. The track had virtually vanished from memory and sight but was remapped and reinstated by the hard work of local club, the Ben Cruachan Walking Club over a 20 year period. It was officially reopened in 1988.