There is a moment, somewhere around the third week of working locks, when you stop counting the days and just live on the boat. That is when crossing France by canal stops being a delivery passage and becomes the trip itself. We did it in 2024 from Le Havre to Port-Saint-Louis, and I would do it again tomorrow.
What follows is the overview I wish someone had handed me before we started, because the planning is genuinely the hard part. The cruising is the easy bit.
Why people do it at all
For a sailing boat moving between northern Europe and the Mediterranean, the alternative to the canals is the long way round: down through Biscay, across the bottom of Spain and Portugal, through Gibraltar, and along the Spanish Med coast. That is well over 1,500 nautical miles of open-water passage-making, some of it across exposed and tide-ripped water.
The canal route is shorter in distance, sheltered the whole way, and it takes you through the middle of France instead of around the edge of Iberia. The trade-off is the mast comes down, you move at walking pace, and you work a great many locks. For a lot of cruisers, especially short-handed couples who do not relish a Biscay crossing, that is a trade worth making.
The routes, roughly
There is no single canal across France. The network gives you several ways through, and which one suits you depends mainly on your air draft and your draught. The common shape is the same: come in from the Channel, work your way to the Saone, drop down the Saone to Lyon, and run the Rhone to the sea.
The main entry options:
- Le Havre, up the Seine to Paris, then various canal routes south to the Saone. The Seine is wide and tidal at first, with commercial traffic.
- Calais or Dunkerque, through the northern canal network, longer but flatter.
- The Loire-side and central canals, including the Briare and lateral Loire routes, which feed into the Saone basin.
Whichever way you start, you converge on the Saone, then the Rhone. The numbers that frame the whole job:
- Roughly 1,300 to 1,400 km of inland waterway, depending on route.
- Somewhere between 150 and 200-plus locks across the full transit.
- An air draft limit of about 3.5 m on the most-used routes, the figure that forces the mast down.
- A draught limit around 1.8 m on Freycinet-gauge sections, less in a dry summer.
- The final stretch down the Saone and Rhone to the Mediterranean, with the big commercial locks doing the heavy lifting.
The route stages, in real numbers
It helps to break the crossing into the chunks French Waterways uses, because the character changes completely from one to the next.
The Seine and Marne leg, Le Havre or Honfleur up to Conde-sur-Marne, runs about 600 km with only 28 locks and takes four days minimum at a working pace. Wide water, big locks, commercial traffic, the easy bit. Air height here is 3.7 m and draught 1.8 m.
Then the Marne to Saone leg, Conde-sur-Marne down to Chalon-sur-Saone, is the grind: roughly 375 km but 131 locks, again four days minimum but realistically a fortnight if you are human about it. Air height drops to 3.45 m, which is the binding constraint that decides whether your mast can ride on deck or has to go by road. Beam limit here is 5.1 m.
The final Saone and Rhone run from Chalon to the Mediterranean is about 460 km with only 16 locks, but they are vast and shared with barges and tankers. Two days minimum downstream when the current is with you. Draught here jumps to 3.5 m and air height to 4.9 m, because this is a serious commercial river, not a canal. I have written up that finale in detail under down the Rhone from Lyon to the sea.
Add those up and you are around 1,435 km and 175 locks for the classic Seine-Marne-Saone-Rhone line. The Bourgogne or Centre alternatives swap distance for lock count and scenery in either direction. None of them is "the" route, and the one that fits you is the one your air draft and draught allow.
The mast is the whole problem
I am not exaggerating. The single biggest piece of planning for any sailing boat is what to do with the rig. Bridge clearance on the main routes sits around 3.5 m, and a stepped mast is far taller than that, so it has to come down at the start and go back up at the end.
The usual answer is a mast service: a yard at your entry port lifts the mast, lashes it on deck or sends it by road, and another yard at the Mediterranean end, around Port-Saint-Louis or Port Napoleon, steps it again. Rouen and the TEC Ocean yard at Honfleur's Bassin Carnot do this every season and know exactly what they are doing. You do not want to be improvising any of it.
There are two ways to handle the spar once it is down. Carry it on deck, supported on a gantry, which keeps it with the boat but adds length fore and aft and a fair bit of windage. Or send it ahead by road, which keeps the boat tidy but means committing to a date and a destination yard. Road transport of a mast from Rouen to Port Napoleon near Marseille has been quoted at around 1,300 to 1,500 euros, so it is not a trivial line in the budget either way. The whole subject, including the exact clearances and the boats that just squeak under with the mast up, is covered properly in air draft on the French canals. Read it before you book anything.
If you are working out whether to buy a boat for this at all, rather than hire, the cost and commitment of the two mast operations is one of the things that tips the sums. I have set the trade-off out in hiring versus owning a boat on the French canals, and it is worth a look before you commit a chequebook.
How long it really takes
People ask me for a number and I refuse to give a tight one. We took about six weeks at a relaxed pace with plenty of rest days. You could push it in four if you treated it as a delivery and worked dawn to dusk, but why would you. You could equally spend a whole summer if you detoured up side canals like the Canal de Bourgogne through the vineyards, which is what I would do with my own time.
The pace is dictated by locks and by the rhythm of the French day. Nothing moves over the lock-keepers' lunch, roughly noon to one. Many small canal locks run only from about 9am to 7pm in high season and shorter shoulder-season hours, so an early start does not buy you much before the first lock opens. Plan on covering 30 to 50 km a day on the easier sections and far less where the locks come thick and fast.
On the worst stretch, the Marne to Saone with its 131 locks in 375 km, you are working a lock roughly every 3 km. Many of those are automated now, triggered by a hanging pole or a remote handset VNF lends you, but plenty still have a keeper who follows you along by moped from one chamber to the next. You learn quickly that a calm crew, lines led correctly, and someone who can step ashore cleanly makes the difference between a relaxed day and a frazzled one. If the mechanics of a French lock are new to you, read how a French lock works before the first one, not at the gate.
The money and the paperwork
Every boat over 5 m needs a VNF vignette, the toll for the French inland network, priced by length and by how long you are on the water. For a multi-week transit you want the longer-duration pass, and there is a discount for booking the annual Liberte pass early in the year. The bands are set out in the VNF vignette guide.
You also want your competence sorted. France expects an ICC with the CEVNI endorsement for inland waters, which is a separate box to tick from your coastal qualifications. Sort it at home, well before you arrive.
Budget too for the two mast operations, fuel, and the occasional marina night where you actually want power and a hot shower rather than a free village quay.
The thing nobody warns you about
You will not want it to end. We came out at Port-Saint-Louis, stepped the mast, and sat in the cockpit looking at the Mediterranean feeling oddly flat, because the canals had been so much better than the destination. The Rhone finale is genuinely thrilling, and I have written about that final run in down the Rhone from Lyon to the sea, but the heart of the trip is the slow middle.
Take more time than you think you need. Bring bicycles. Learn enough French to chat to the lock-keepers. The crossing rewards the unhurried, and punishes the boat that treats it as a shortcut.
