The Soonwaldsteig is an approximately 83 km long long-distance hiking trail. The trail leads from Kirn in the Hahnenbach Valley on wooded quartzite ridges down through the romantic Rhine Valley to Bingen. More than 40 km of the 85 km long Soonwaldsteig trail in the area of Großer Soon and Lützelsoon mountains is uninhabited and only crosses small, seldom used roads.
And a must read if you go unsupported. The map where you can find taps with drinking water: https://www.soonwaldsteig.de/service/netz-offener-wasserhaehne