What an amazing moonset!
On cycleways, mostly dedicated. Easy to ride, the total distance is about 60 km long on a flat surface, mostly on asphalt; only one small segment is on a track and another one on gravel. The North segment to Offenburg is nicer than the South back to Strasbourg via Illkirch.
Download GPX file.
Time lapse video in Place Kleber, Strasbourg. Direct link to the video file (720p)