Lock 11 — La Prée – Blain 44 loop from Le Gâvre

France

Pays de la Loire

Châteaubriant-Ancenis

Le Gâvre

Lock 11 — La Prée – Blain 44 loop from Le Gâvre

Moderate

riders

Lock 11 — La Prée – Blain 44 loop from Le Gâvre

03:19

59.5km

210m

Gravel riding

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: October 1, 2026

Waypoints

Start point

Bus stop

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21.5 km

Abbaretz lagoon

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A half-Mordor, half-Mad Max atmosphere with these reddish-orange marshes. The color is due to the oxidation of heavy metals contained in these highly acidic waters: iron, manganese, cobalt, and... arsenic. …

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22.8 km

Abbaretz mine spoil tip

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A truly amazing site. Bring a lock, as you have to leave your bike at the bottom of the steps.

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40.6 km

View of the Isac dam and the Nantes-Brest canal from Bout du Bois

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This passage runs along several hundred meters of the dike which separates the Isac river from the Nantes-Brest canal. Always nice to see two rivers side by side.
The surroundings are very quiet and with shade if necessary.

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44.5 km

Canal de Nantes à Brest

Lake

46.2 km

Gué de l'Atelier Lock

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Lock number 9. Here, the canal meets a wilder branch of the Isac. A little further on, you can even drive INTO the Isac (see photo).

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47.8 km

Terrier Lock

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Lock number 10. Very friendly welcome at the lock house, which offers drinks, ice creams, etc. And the terrace under the trees is really nice.

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51.1 km

Lock 11 — La Prée

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A lock among others? No, because here you can have your bike repaired! This repair workshop is ideal because it is located along the Vélodyssée.

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52.5 km

Blain 44

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It is a fairly active port on the Nantes-Brest Canal, with a capacity for up to 30 pleasure craft and 3 barges. Bars, restaurants, and public restrooms are available.

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52.6 km

Le Monkey Bike Bar

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The Monkey Bike Bar is a must-see place (Bar) on the Nantes-Brest canal! ideally located on the port of Blain with a terrace to quench your thirst with a nice …

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