Yesterday a very nice trip, we found it on the internet, and very worthwhile. It is a nice trip south of Joure and Heerenveen. We started the tour in Skarsterbrug at the Vreugdenhil milk factory, opposite the factory is a small parking lot, from here we cycled along the water towards the highway, under the highway the route started.
Here is a link to tour
https://www.route.nl/fietsroute/543574/westskoatterpaad-anwb