There are two ways to get a boat from the English Channel to the Mediterranean. You can sail it the long way round Spain and through Gibraltar, a thousand miles of open water and the Bay of Biscay, or you can cut straight through the middle of France on the canals. We did the canals, mast lashed on deck, in one summer, and it remains the most extraordinary boating we have ever done. Here is the real version of how a season-long crossing of France works, with the numbers that decide whether your boat can do it at all.
I write this as someone who motored, not sailed, for ten weeks. That is the first mental adjustment. The canal crossing is not a sailing trip with a few locks; it is a long, slow river-and-canal voyage in which the rig spends the whole time horizontal. If that idea appalls you, the cross France by canal from Channel to Med overview will talk you out of it gently. If it intrigues you, read on.
First, can your boat fit?
Everything begins with dimensions, because the canals will simply not let an oversized boat through. The historic working network is built to the Freycinet gauge, a standard set by law in 1879: a maximum 38.5 metres length, 5.05 metres beam and 1.8 metres draught, with bridges giving a standard 3.7 metres of air clearance. Most cruising yachts fit the length and beam easily; the two numbers that catch people out are draught and air draught.
Draught is the hard limit. If your boat draws more than about 1.6 metres you will be nervous in the shallower canal sections, and over 1.8 metres you are courting trouble. The Freycinet gauge canal dimensions detail is worth memorising before you commit.
Air draught is the one you control, because you take the mast down. Once unstepped, your air draught is whatever sits highest on deck: the coachroof, the sprayhood, the radar arch. Keep it under 3.5 metres and you clear everything; the lower you can get it, the easier the bridges and tunnels. The full unstepping question is covered in air draft in the French canals.
Where to take the mast down
Coming in from the Channel, the usual sequence is up the Seine. You can motor a yacht as far as Rouen with the mast still standing; beyond Rouen the bridges drop and you must be down to around 3.5 metres air draught to continue, so Rouen is where most crews unstep. There is a re-masting facility there for exactly this purpose. Le Havre to Rouen is roughly 120 kilometres of tidal river, so you time your departure with the flood and let the current carry you up.
Lift the mast, lash it on deck with the spreaders padded so it overhangs neither end too far, and accept that for the next two months your boat is a motorboat with a long awkward pole on top. Plan the lashing properly. A mast that shifts in a lock is a season-ending problem.
The route through the middle
From Rouen you press on up the Seine to Paris (yes, you motor through the centre of Paris, past the Eiffel Tower, which never stops being absurd), then on to Saint-Mammes where the route splits.
The two main southbound options are the Bourbonnais route, which is longer but has fewer locks, and the Burgundy route up the Yonne, which is shorter and prettier but works you harder with more locks. We took Burgundy for the scenery and paid for it in lock-handling. Either way you climb to a summit, cross it, and start the long descent towards the Saone. From Lyon, the final leg down the Rhone to Port-Saint-Louis at the river mouth is about 310 kilometres of big, fast river. The whole France crossing is several hundred locks depending on your route, so this is a marathon, not a sprint. If you would rather end your transit on the famous southern canal instead of the Rhone, the Canal du Midi by boat gives you an alternative finish: 240 kilometres and 100 locks of its own, dropping 189 metres to the Thau lagoon.
The paperwork and the licence
You cannot just turn up. France requires a waterways licence (the VNF vignette) for the canals, valid for the period you are transiting, and you need a competence certificate. The VNF vignette for French waterways explains the charging by boat size and duration, and the CEVNI and ICC licence for French waterways covers the qualification you must hold to skipper on inland water. Sort both before you leave home; trying to fix it mid-transit is miserable.
The timing that makes it a single season
The canals are not open all year. Sections close in winter for maintenance, called chomage, and some run dry or freeze. The workable window for a full crossing is roughly May to October. Here is the rhythm that fits a season.
- May: cross the Channel, work up the Seine, unstep at Rouen.
- June: Paris and the central canals, learning the lock routine.
- July to August: the summit, the descent through Burgundy or the Bourbonnais.
- September: down the Saone and the Rhone, or onto the Midi.
- October: re-step the mast at the Mediterranean end and emerge into the sea.
Average a canal day, not a sea passage. We managed perhaps 30 to 50 kilometres a day with the locks, less on the heavy days. Build in slack for breakdowns, lock queues and the simple desire to stop in a village for two nights because the market is on. Crews who try to rush the canals hate them; crews who let the canals set the pace come out the other end changed.
Life aboard at three knots
The thing no brochure prepares you for is how completely the rhythm of life changes once the mast is down. At sea you stand watches and cover ground. On the canal you wake when the locks open, potter a stretch, tie up against a tree-lined bank in the afternoon, and walk into a village for bread and wine. The boat becomes a slow caravan with a keel.
The lock-handling is the daily work, and with a two-person crew it is the part that tests you. One steers, one handles the lines, and on the climbing locks you are throwing warps up to bollards above your head while the water boils in. Some locks are automated, some have a keeper, and on the busy stretches you queue. We settled into a routine where my wife took the helm and I took the lines, and after the first fortnight it became second nature. Folding bikes earn their deck space here more than anywhere, because the village with the boulangerie is often a kilometre from the quay.
Provisioning shifts too. You are never far from a supermarket or a market, so you stop carrying a sea passage's worth of tins and start shopping like a local, daily and fresh. After the discipline of offshore stores, it feels almost decadent.
The hazards people underestimate
It is easy to think of the canals as risk-free after the open sea, and that complacency is the danger. The Rhone is a big, fast, commercial river that runs hard after rain, and a yacht with a temporary motorboat rig has limited power against the current; you go downstream with it and pick your moment. Commercial barges have right of way and little patience, so you keep well clear and watch for them on the blind bends. Low bridges have caught out crews who measured their air draught carelessly, and a single overlooked aerial or radar dome can stop you dead at a bridge with a barge queuing behind. Measure twice.
The other quiet hazard is the schedule. Sections close for maintenance, the chomage, and a closure you did not check can strand you for days or force a long detour. Check the VNF notices for your route before and during the transit, not just at the planning stage.
Was it worth it?
Unreservedly. We swapped a thousand miles of Biscay swell for vineyards, locks operated by chatty keepers, and dinners tied to a quay below a chateau. We saw the middle of a country from its water, which almost nobody does. The mast went back up at Port-Saint-Louis in a morning, and we sailed into the Mediterranean having crossed France at three knots.
It is slow, it is fiddly, and the lock-handling will test a two-person crew. But if you have a boat that fits the gauge and a summer to spend, taking the Channel to the Med through the canals is the most quietly remarkable passage in European boating. We logged every lock, mooring and fuel stop along the way, and that record is what we hand to every crew who asks us whether they should do it. The answer, if your draught fits, is yes.
