VVV Dordrecht has put together this cycle route based on cycle junctions. You will first cycle through the historic centre of Dordrecht and then across the island to the Kop van 't Land ferry. The ferry takes you and your bicycle to the Brabant part of NP De Biesbosch. On the way, you will pass the Biesbosch Museum Island and then take the same ferry back to the Island of Dordrecht. There was a lot of fighting in this area during WWII and you will come across various casemates and bunkers. Because the cycle route uses junctions, you can start the route at any point. Below is an example of how you could cycle the route.
Order the route description in the VVV web shop.