The Promenade Bleue is a calm route alongside the River Seine which runs from Gennevilliers in the western Parisian suburbs, to Rueil-Malmaison, with an optional continuation to Bougival, a few kilometers further west. The path runs continuously for ten kilometers or so, uninterrupted thanks to a recent footbridge which crosses the inlet from the Seine into an industrial estate in Nanterre. Prior to the bridge, it was necessary to make a large detour in order to continue the journey.
By public transport, however, it can be a tad tricky to access. The easiest way by rail is to take the RER A line out of Paris, direction Saint-Germain, and to alight at Ruel-Malmaison. Once you leave the station, it is quite easy to find the river banks. Just before the path is an area with a few cafés and restaurants, perfect when it’s nice to take a drink outside. Otherwise, from the Gennevilliers end things are a little complicated. The nearest stations are Argentueil and Le Stade, both of which are a fair distance from the path and involve busy roads. By road it is possible to go to the Parc Pierre Lagravère where there is ample parking. From the other end, I guess that it is possible by train to go to Bougival and cycle down through the town. Another option would be Chatou, on the other side of the river, then cycle down to the river bank, turn left towards Bougival along a traffic-free river path, cross the Seine at Bougival and turn left to pick up the path on the other bank.
So, from the Bougival end, the first couple of kilometers are a bit rough in places, but okay for a town bike or a folder – just take it easy. After the golf course in Rueil Malmaison, the path rejoins the Boulevard Belle Rive, normally residents only so there may be one or two cars. The surface here is road and in decent condition. The Seine curves (no pun) gently round, and in front you will see the Pont de Chatou. We are in Rueil, now, with the option to have a drink at a café table.
The path is on a traffic-calmed road for a couple of hundred metres before heading on its own way on the river bank. Here you really are on the banks, and there are some fine views of the river, the birds and the boats that ply along the water. Once pas the Parc des Impressionnistes (no bikes allowed) the path is on a fine white gravel, and starts to become both industrialised and wild at the same time. You will cross the odd access path to a jetty on the river with the factory on the right. Then you arrive at the inlet, and the impressive footbridge, high above spanning the water. It’s steps only, with a ramp on the right hand side for pushing your bike. The view from the top is quite impressive. Here’s a link to a page with a nice photo of the bridge : here There are lifts available, but each time that I have used the path they have not been working.
Over the bridge the route continues with industrial landscape on your right and the river / nature on your left. The route now passes under the A14 motorway, on your right is a park which is being transformed into a nature reserve. From here until the Pont de Bezons we have water on the left and industry on the right. The path here is also white gravel but easy for a folder. Under the bridge and the path enters the Parc Pierre Lagravère which curiously enough has signs indicating no bicycles allowed. But there are bikes in the park, so maybe the sign is out of date. Otherwise, there is a cycle track sandwiched between the park and the busy A86 motorway.
The journey ends (for the moment at least) at the busy intersection with the A86 and the rue Paul Bert (Pont de Colombes) in Colombes. Optionally you can turn right under the bridge (there are cycle lanes indicated) and take the Rue Paul Bert into Colombes, where you pass the Stade Yves de Manoir, formerly the national football and XV stadium, where the final of the World Cup 1938 was held. From here it is possible to cycle to Le Stade station and get a train back to Saint-Lazare. Otherwise turn round and go back along the river to Rueil.
Looking along the River Seine towards the Pont de Chatou