A mainly rural walk with farmland and commons, passing around Biggin Hill airport with its wartime connections. The full route extends to Downe where Down House was Darwin's home - see Bromley Circular Walks page for more details and Darwin links. One of the Bromley Circular Walks, several of which can be linked to make a much longer route. Part of the route coincides with the London LOOP.

https://ldwa.org.uk/ldp/members/show_path.php?path_name=Leaves+Green+Circular

Sugarcreek Metro Park, in Bellbrook, OH, has a variety of trails.  The longest hiker trail is the 5km Green Trail.  It makes a good route for multiple laps.  You may run either direction.  The park map is here:  https://www.metroparks.org/wp-content/uploads/2016/01/SugarcreekMap_03-2017.pdf

Singapore Round-The-Island.

Course primarily follows the coast of Singapore according to a long establish but unofficial cycling route. The southwest corner cuts out the Tuas industrial/port area. The route can be completed from any starting point but all variations should take in the following (clockwise from 12 o'clock):

Woodlands Checkpoint 

Woodlands Waterfront Park

Sembawang Park

Punggol Island

Punggol Point Park

Coney Island

Pasir Ris Park

Turnhouse Park

Changi Beach Park

Changi Coast Track