The Avenue Verte is the official London to Paris bike route, connecting the London Eye to Notre Dame.
398km via Beauvais and Senlis
462km via the Epte Valley and the Vexin regional park
Difficulty: Relatively easy with the odd hilly stretch.
Download the full GPX file
While there are many do-it-yourself London to Paris adventures to be had on a bike, the Avenue Verte is the official signposted one. There are two route options – both outlined in more detail here.