A a well signposted, circular bike route showcasing the vineyards and orchards of Duras in the Lot-et-Garonne.
Duras is a hill-top market town that boasts a castle overlooking the Dropt river in Lot-et-Garonne area of Nouvelle-Aquitaine in south-west France. It's 80km south-east (ish) of Bordeaux, and not far from the Canal de Garonne Bordeaux-Toulouse bike route (which is signposted from Duras).
This route can also be combined with the nearby Circuit du Duc de Lauzan.
See: https://www.freewheelingfrance.com/bike-routes-in-france/circuit-vignes-et-vergers-en-duraquois-cycling-duras.html