A 58 km cycle path between Velen and Anholt along the Bocholter Aa river.

https://www.borken.de/fileadmin/daten/mandanten/kreisstadt/PDF-Dokumente/Touristik/Flyer_Bocholter_Aa-Radweg_Druckversion_Stand_Mai_2011.pdf

The trail starts in Herrenberg and goes all the way to Castle Hohenentringen and is a part of the long distance hiking trail, named HW5. When you tapped the castle's wall, you doing the same route back to Herrenberg. It is a strenous trail with an altitude of round about 500 meters. Distance is 25,8 kilometers

--submitted by Marcus Muhr

From the USDA's Forest Service website:

This is an officially designated trail located in Zaleski State Forest, Zaleski, Ohio.  ~48km.

The route follows the Zaleski Backpack trail from point A (on the official park map), through all three loops with minimal repetition, back to point A. The only section the route does not use is the "Connector Trail" from point Y to K.

The Harzer Försterstieg is an almost 60 km long, signposted and marked hiking trail in the districts of Goslar and Göttingen in Lower Saxony (Germany). The trail leads from Goslar via Wolfshagen in the Harz Mountains, Lautenthal, Wildemann, Bad Grund (Harz), Buntenbock and Lerbach to Riefensbeek-Kamschlacken near Osterode in the Harz Mountains. The trail passes three reservoirs: Granetalsperre, Innerstetalsperre and Sösetalsperre. The trail is marked by a green oak leaf.