This is the most ambitious bike ride out of Saint-Malo, and the most memorable. 55 kilometres one way, almost entirely flat, with the Mont growing on the horizon for the final twenty kilometres. This guide covers the route, the kit you need and the three ways to get back.
One warning up front: what makes this ride is not the terrain, it is the distance and the wind. Read the wind section before you go, because it decides whether your day is beautiful or grim.
At a glance
The route in four sections
Km 0-15: Saint-Malo to Cancale
Vélomaritime (EV4) • Rolling • Moderate
The first section is the only genuinely hilly part of the day: the Sillon seawall, then Rothéneuf and the three short climbs of the wild coast before Cancale. Ironically it is the hardest stretch of the route, and it comes while you are fresh. The kilometre-by-kilometre detail is in our Saint-Malo to Cancale guide.
Km 15-25: Cancale to Le Vivier-sur-Mer
Coastal road then dyke • Flat • Easy
After Cancale the relief vanishes all at once. You round the headland and drop towards the bay, where the landscape changes completely: no more cliffs, but a vast tidal flat and the mussel bouchots of Le Vivier-sur-Mer lined up in the water. This is where the genuinely flat part begins.
Km 25-42: the Duchesse Anne dyke
Dyke • Completely flat • Wind-exposed
The long straight along the bay, through Cherrueix and Saint-Broladre. Nothing breaks the wind here: no trees, no buildings, no relief. With the wind behind you it is a conveyor belt and you barely notice the distance. Into a headwind, these 17 kilometres are the hardest of the day. Cherrueix happens to be a well-known land-yachting spot, which tells you everything about the local wind.
Km 42-55: the approach
Quiet roads and cycle route • Flat • Easy
You leave the dyke for the polders, then join the cycle route that runs to the Mont along the bank of the Couesnon. The Mont is in sight for this entire stretch and grows slowly. The final kilometres are purpose-built and car-free: it is the finest possible arrival.
The wind: what makes or breaks this day
For the final 40 kilometres there is nothing to shelter behind. The bay of Mont Saint-Michel is open, flat and windy, and the prevailing wind comes from the west. That has one simple practical consequence: on the way out you will often have it behind you, and on the way back into your face. Which is the wrong way round, since the return happens on tired legs.
Three simple rules
- Set off early. The wind usually builds through the day. Leaving at 8am gets you across the dyke while it is still calm.
- Check the wind direction the day before. Easterly forecast? Hard on the way out, easy coming back, so plan accordingly. Strong westerly? Consider the train home.
- Take a windproof layer, even in fine weather. Standing still on the dyke is always colder than you expect.
This is also the most honest argument for an electric bike on this route. It is not about hills, there are barely any. It is that a 25 km/h headwind across 17 kilometres of dyke turns a ride into an ordeal.
On arrival: where to leave the bike
You do not ride to the ramparts. Bikes are left at the designated parking near the Couesnon barrage and the visitor centre, and the last two kilometres are covered on foot along the causeway or by the free shuttle. Allow 25 to 30 minutes walking, on a flat and well-made path.
A lock comes with every rental, and you should use it: the parking is busy in season. If you have panniers, take them with you rather than leaving them on the bike.
The detail that changes everything: check the spring tide calendar before picking your date. At high spring tide the sea surrounds the Mont completely, and it bears no resemblance to a low-tide day. Those times are published well in advance and are worth planning around.
Getting back: three options
Option 1: by bike, the same way
110 kilometres over the day. Entirely doable on an e-bike if you start early, more committing on a city bike. If the wind has turned in your favour, the return is often quicker than the outward leg.
Option 2: the train from Pontorson
Pontorson-Mont-Saint-Michel station is about 9 kilometres from the Mont, linked by a shuttle and by a quiet back road. From there the regional TER runs to Saint-Malo with a change at Dol-de-Bretagne. TER trains take assembled bikes, but the number of spaces is limited and varies: check timetables and conditions before you go rather than on the day.
Option 3: we come and get you
If you would rather ride out and return another way, tell us when you book. A pick-up is arranged in advance, not on the day: our delivery schedule is set the evening before.
Frequently asked questions
How far is Mont Saint-Michel from Saint-Malo by bike?+
Roughly 55 kilometres along the coast, via Cancale and then along the bay. Allow 3 hours 30 to 4 hours 30 depending on the wind and the bike. From Cancale it is about 45 kilometres.
Do I need an electric bike?+
The route is almost entirely flat, so it is technically doable on a city bike. But 110 kilometres there and back with the bay wind is a long day. An e-bike is strongly recommended for the round trip in a day: our 625 Wh batteries cover 80 to 120 km in Eco mode.
Can you cycle right up to the Mont?+
Not up to the ramparts. Bikes are left at the designated parking near the Couesnon barrage and the visitor centre, and the last two kilometres are done on foot along the causeway or by the free shuttle. A lock is included with every rental.
How do I get back to Saint-Malo?+
By bike along the same route, by train from Pontorson-Mont-Saint-Michel station (about 9 km away, change at Dol-de-Bretagne, limited bike spaces, check timetables), or by arranging a pick-up with us when you book.
When is the best time to set off?+
Early in the morning. The bay wind usually picks up during the day and you want it behind you coming back, not in your face. The Mont is also far quieter before 10am. Check the spring tide timetables: at high spring tide the sea surrounds the Mont completely.
Is it doable with children?+
55 kilometres one way is a lot for a child pedalling. The flat section from Cancale, though, lends itself well to a shorter family outing, and we have trailers, child seats and tow bars. See our family cycling guide.
Key takeaways
- • 55 km one way, 110 km there and back. Almost entirely flat.
- • The only climbs are in the first 15 kilometres, before Cancale.
- • The bay wind is the real difficulty, not the terrain.
- • Set off early: less wind, and a much quieter Mont.
- • Electric bike strongly recommended for the round trip in a day.
- • Bike left near the barrage, 2 km on foot or by shuttle to the Mont.
- • Return possible by train from Pontorson, limited bike spaces.
Heading for the Mont?
Electric bike, panniers and route map. Free delivery in Saint-Malo.