Nice two river roundtrip from / to Gemuenden am Main. First 1/3 along Sinn or Saale (depending on CW or CCW direction) on bike path. Middle 1/3 on rural road (MSP 17) linking the two valleys. Nice and steep but no dedicated bike path. Interesting bridge crossing the route in the middle of the woods. Leftover from never build Autobahn. Enjoy the ride.