Radfernweg vom Hamburger Hauptbahnhof zum Bremer Hauptbahnhof 

https://www.radfernweg-hamburg-bremen.de/

The Friese Woudenpad (LAW 1-1) is an official LAW (Long Distance Hiking Path) running from Lauwersoog to Steenwijk, the Netherlands. It is marked by the traditional white-red marking. It is marked both ways. It crosses multiple National Parcs, including: Lauwersmeer, Friese Wouden, Nationaal Park Drents-Friese Wold and the Weerribben. It runs from the province of Friesland south and the finish is in the northern part of the province Overijssel. After the start the route takes you over an impressive enclosure dam. The Frisian nature is isolated, sometimes rough and unforgiving.

The Ice Age Trail runs through Washington County, with access points on the north and south border of the county.

The northern border of Washington County on the IAT is met just 0.39 miles south of the intersection of Kettle Moraine Dr, so it is easiest to use Kettle Moraine Dr at the
"Welcome to Lakeshore Chapter Eastern Terminus 184.4 Miles" sign as the northern terminus of the county.

The southern border of Washington County on the IAT is at the intersection of County Line Rd (Q) and Kettle Moraine Scenic Drive (K), on the south side of the IAT Loew Lake Segment. 

The Polden Way is a footpath project which links together areas of land with public access on the Polden Hills between Walton, near Street, and Hurcot, near Somerton. It has opened up a path through King’s Wood: an area between Combe Hill and Great Breach Wood which previously had no public access. Starting from the west end of The Polden Way, Walton Hill, Ivythorn Hill, and Collard Hill have been popular with, and accessible to generations of walkers. The project has improved some of the existing paths and views here, with trees and scrub being cut back.