The Shining Sea Bikeway follows the route of a former railroad line run by the New York, New Haven and Hartford Railroad Company, which ran service to New York and Boston from 1872 to 1965. After the railroad company discontinued service along the line, local residents Joan Kanwisher, Barbara Burwell (mother of Rails-to-Trails Conservancy’s cofounder David Burwell), and several other supporters organized in a nine-year-long effort to have the village of Woods Hole acquire the land and build a trail, which officially opened in June 1974. 

Rennsteig is a famous hiking trail over the Thuringian Forest beginning in Hörschel to Blankenstein on the river Saale.

https://www.visit-thuringia.com/travel-hotel-holiday-tour/it-s-all-about-the-journey-the-rennsteig-trail-167484.html

The Ouse Valley Way is an established 150-mile trail in England, following the River Great Ouse from its source near Syresham in Northamptonshire to its mouth in The Wash near