The first thing nobody tells you about a canal du midi one week trip is that the week is shorter than you think. You lose the better part of the first afternoon to the handover briefing and provisioning, and the last morning to handing the boat back clean. So you are really planning five and a half cruising days, not seven, and the canal does not care how keen you are to make miles.
We learned that the hard way on our first hire. We had pencilled in a route that, on the map, looked gentle. On the water, with the locks shutting for lunch and a queue of three boats ahead of us at every chamber, it turned into a forced march. The second time we went slower, covered less, and enjoyed it ten times more. What follows is the route I would give a friend, with honest distances and the timing tricks that make or break the week.
The constraints you are planning around
Two numbers run the whole canal. The locks are open from 08:00 to 17:30 in the shoulder season and 08:00 to 19:00 at the height of summer, and they all close from 12:30 to 13:30 for the lock-keeper's lunch. Roll up to a chamber at 12:35 and you have an hour to kill whether you like it or not. Plan your day around that single fact and everything else falls into place.
The canal itself runs 240 km from Toulouse to the Etang de Thau near Sete, with around 91 working locks along the way. You will not see all of it in seven days, and you should not try. A sensible day on this canal is 30 to 40 km, and that already means five or six hours at the wheel because you potter along at 6 to 8 km/h and stop dead at every lock. Pick a one-way section, let the hire base shuttle your car, and resist the urge to cram.
Most people do this in a hire boat, and for a first trip that is the right call. No licence is needed, and a week runs roughly 1,200 to 2,000 euros for a mid-size cruiser outside August, more for a big boat in peak season. If you are weighing it up against bringing your own craft, I have set out the maths in hiring versus owning a boat on the French canals.
The itinerary below assumes a Castelnaudary base heading east towards Beziers, which I think is the best single week on the canal. It packs in the summit, the wine country, the Malpas tunnel and the headline staircase at Fonseranes without rushing.
Day 1: Castelnaudary, settle in
Pick the boat up early afternoon, do the briefing properly, and do not feel you have to move far. We crossed the Grand Bassin at Castelnaudary, a wide ornamental basin that doubles as a turning pool, dropped through the four-chamber Saint-Roch staircase just to get one lock under our belts, and tied up below it for the night. Walk into town for cassoulet, the bean and duck stew the place is famous for, and accept that you have earned an early start tomorrow.
If you have never worked a lock before, read how a French lock works the evening before you collect the boat. The Midi's locks are the old oval shape, and the curved walls make line handling fiddlier than the straight-sided chambers you may have seen elsewhere.
Day 2: the summit and the long pounds
This is the day you climb to the roof of the canal. East of Castelnaudary the locks come thick, then thin out as you reach the Seuil de Naurouze, the watershed of southern France where the water decides whether it ends up in the Atlantic or the Mediterranean. From here you are heading downhill all the way to the sea.
Aim for around 30 km and stop in or near Bram or carry on towards Carcassonne if you have made good time. The point is to bank the climb early in the week while you are fresh and before the holiday-traffic locks slow you down.
Day 3: Carcassonne
Make Carcassonne your target. The medieval citadel on the hill above the canal is the kind of sight that justifies a half-day off the boat, and the town moorings put you within a walk of it. Treat this as a short cruising day on purpose. Tie up by late morning, spend the afternoon up at La Cite, and let the legs do some work for a change.
Carcassonne is also a logical place to check that your provisioning is holding up. There is a proper supermarket within reach, which is not true of every village quay further east.
Day 4: into the wine country
Below Carcassonne the canal eases into the vineyards of the Minervois, and the cruising gets quieter. This is mooring-against-the-bank country: find a gap in the plane trees where the depth allows, hammer in a couple of stakes, and step off into the vines. Trebes makes an easy lunch stop, and Homps further on is a popular overnight with a base and a few restaurants.
Town and village moorings here are often free, or charge a small fee, usually 10 to 20 euros, for water and electricity. After years of coastal sailing where every night in a marina hits the wallet, the economics of the Midi still feel slightly unreal to me.
Day 5: Le Somail and Capestang
A gentle, scenic day. Le Somail is one of the prettiest stops on the whole canal, a tiny hamlet with an old stone bridge, an ice-cream barge and a floating second-hand bookshop that has been there longer than most of the boats passing it. Push on to Capestang, where the church tower dominates the skyline for miles and the bridge just before the village is famously low, so check your air draught and have everyone duck.
You are now within striking distance of the two structures that make this section special, so set yourself up for an early start.
Day 6: Malpas tunnel and the Fonseranes staircase
This is the big one. First comes the Malpas tunnel near Colombiers, 165 metres bored straight through the Enserune hill in 1679 and 1680 and reckoned to be the oldest navigable canal tunnel in Europe. It is one-way and unlit inside, so wait your turn, switch your navigation lights on and idle through. It takes a couple of minutes and feels far older than anything else on the trip.
Then comes Fonseranes, just above Beziers. The staircase was built with eight chambers and nine sets of gates, which is why locals call it the nine locks, and a boat heading for the sea now works through six linked chambers that drop you 21.18 metres over a run of about 315 metres. It is the steepest flight on the canal and a genuine spectacle, with crowds watching from the banks. Time your arrival for the morning, because the keepers control the flight in batches and you do not want to be the boat that misses the last downhill cycle before lunch.
Moor in Beziers for the night. You have done the hard miles and the famous bits, and the city is a good place to celebrate.
Day 7: hand back, or push to Agde
Most one-week hires turn round here, with the base collecting the boat at or near Beziers. If your hire runs the other way and you have a full final day, you can continue past the unusual round lock at Agde, the only circular lock on the canal, towards the Etang de Thau and Sete on the Mediterranean. For a tidy seven-day loop, though, Castelnaudary to Beziers is the right length: enough to feel you have travelled, short enough to do it at canal pace.
What I would do differently
If I ran this week again, I would build in one full rest day with no locks at all, probably at Carcassonne, and accept covering less ground for it. The mistake every first-timer makes, me included, is treating the distance as the goal. On the Midi the locks and the lunch closure are the real schedule, not the kilometres.
For the bigger picture before you book, my Canal du Midi by boat overview covers the gauge, the season and the boat-size limits in one place. And if you are still deciding whether to hire at all, start with the practicalities in canal boat hire in France. Get the timing right and a week here is one of the easiest, slowest, most rewarding holidays afloat you can have.
