They have been shot on PC1 in the Bambësch forest, using bracketing, then merged using enfuse.
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.
As you may have seen (where the blue junk is), we lost track of the track at some point but it wasn’t hard to find it back. The walk is enjoyable and its distance is about 5.5 km. Download the GPX file.
Link to GPSies.