This is a custom loop that circles Milwaukee on paved paths, and comes out close to a 50k.

I started on Bradley Road on the "Drexel Connector," continued down the Menomonee Line to its end near Miller Park where I picked up the Hank Aaron State Trail. This continues through Milwaukeee and ends at the Summerfest Grounds. I ran up the lake until picking up the Milwaukee River Line to the Zip Line up to Brown Deer Park where I complete the loop on Bradley Road.

The Lockhart Basin Trail is a 44 mile point-to-point dirt road between Moab and Indian Creek.

Anthony Carroll describes the route starting at Indian Creek:

ACROSS Lexington, is a 40-mile network of marked trails and paths for walkers, runners and bikers that spans the Town of Lexington (Massachusetts). The routes use existing public ways to connect the town center with various historic sites, schools and conservation areas.

The ACROSS Lexington Challenge is to to connect all the marked network in a single run, as efficiently as possible (therefore, people's routes may vary), using the map available at: https://www.lexingtonma.gov/222/ACROSS-Lexington