The small river Ruwer is right-side inflow of the Mosel. Her valley is known for wonderful Riesling wine! The bicycle path runs from Hermeskeil to Ruwer, with a net downhill of 350m.
http://www.bahntrassenradwege.de/index.php?page=Ruwer-Hochwald-Radweg
Note that the GPS track here submitted by Mario is different than the route shown in the link above. At Parking Rösterkopf he visits the source of the Ruwer. After that, the way is through the forest to Kell, where he enters the Ruwer-Path. At the end it's the same; the path ends at a T-Cross to the main road, but the estuary is an add-on.
