Routes

Planner

Features

Updates

App

Get the App

Routes

Bike touring routes & trails

France

Pays de la Loire

Saint-Nazaire

Saint-Gildas-Des-Bois

Château de la Groulais – Paudais lock loop from Saint-Gildas-des-Bois

Routes

Bike touring routes & trails

France

Pays de la Loire

Saint-Nazaire

Saint-Gildas-Des-Bois

Château de la Groulais – Paudais lock loop from Saint-Gildas-des-Bois

Hard

4.0

(4)

riders

Château de la Groulais – Paudais lock loop from Saint-Gildas-des-Bois

08:22

137km

550m

Cycling

Hard bike ride. Very good fitness required. You may need to push your bike for some segments of this route. The starting point of the route is accessible with public transport.

Last updated: August 16, 2026

Waypoints

Start point

Train Station

Get Directions

2.60 km

Bois de Reslin

Forest

60.3 km

L'Isac - super wide and aquatic plants

Highlight • Other

The bank formation looks special.
Aquatic plants grow like carpets on both sides.

Translated by Google •

Tip by

65.5 km

Parc de Carheil

Forest

69.8 km

Beautiful scenery along the Nantes-Brest canal

Highlight • Other

Very pleasant passage along the canal from Nantes to Best. Track well laid out and practicable by all.

Translated by Google •

Tip by

85.1 km

Château de la Groulais

Highlight • Castle

The Château de la Groulais was the largest fortress in the region at the time and was the home of several personalities, including Olivier V de Clisson and Marie Bonaparte, etc.

Translated by Google •

Tip by

86.0 km

Blain 44

Highlight • Structure

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.

Translated by Google •

Tip by

98.0 km

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

Highlight • Viewpoint

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.

Translated by Google •

Tip by

99.0 km

L'Isac dam on the Nantes-Brest canal

Highlight • Other

The canal offers very beautiful walks accessible to everyone with small more technical passages such as "the single hidden" near the dike. Opposite the end of wood beach is very nice too.

Translated by Google •

Tip by

104 km

Canal de Nantes à Brest

Lake

111 km

Lock 11 — La Prée

Highlight • Structure

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.

Translated by Google •

Tip by

113 km

Paudais lock

Highlight • Other

It is nice to see that it is possible to carry out such renovations and continue to preserve the landscape and a culture.
It also shows that there is money here and that people have the opportunity to earn money.

Translated by Google •

Tip by

137 km

End point

Train Station

Way Types & Surfaces

Way Types

67.2 km

54.0 km

6.50 km

4.68 km

3.64 km

1.16 km

120 m

Surfaces

66.0 km

57.4 km

11.6 km

1.14 km

1.03 km

105 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (50 m)

Lowest point (undefined)

Weather

Tuesday 1 September

25°C

12°C

0 %

Additional weather tips

Max wind speed: 18.0 km/h

to get more detailed weather forecasts along your route

Comments

Want to know more?

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

Navigate

Send to Phone

Save

Edit route

Download GPX

Move start point

Embed on a website

Report an Issue

Report restricted access

Nearby routes

Moderate

5.0

Circuit in the Brière Regional Natural Park

04:51h

82.7km

220m

Easy

4.6

Saint-Viaud, Paimb

01:53h

30.9km

120m

Hard

5.0

Béganne Bike Loop

03:04h

48.6km

500m

Easy

4.0

Among the Marais de Gannedel and the Vilaine — loop

01:06h

14.5km

70m

Hard

Circuit de Saint-Guillaume to Blain via EV1

05:05h

84.8km

370m

Moderate

4.7

382

Paudais lock – Blain 44 loop from Discothèque Le Noumba

04:59h

81.4km

230m

Moderate

4.9

327

Barel Lock – Paudais lock loop from Discothèque Le Noumba

04:31h

72.7km

170m

Moderate

4.7

343

Magpie Island – The Oust River and Its Locks loop from Saint-Perreux

04:17h

67.3km

220m

Moderate

4.2

182

Island of Fédrun – Rozé Port and Viewpoint loop from Saint-Lyphard

03:11h

55.5km

160m

Moderate

4.8

222

Blain 44 – Lock 11 — La Prée loop from Blain

02:25h

39.7km

50m

Easy

4.9

225

Canal de Nantes à Brest – Magpie Island loop from Redon

01:56h

28.0km

70m

Easy

4.8

221

Canal de Nantes à Brest – Magpie Island loop from Saint-Vincent-sur-Oust

01:54h

28.1km

110m

Château de la Groulais – Paudais lock loop from Saint-Gildas-des-Bois

L'Isac - super wide and aquatic plants

Beautiful scenery along the Nantes-Brest canal

Château de la Groulais

Blain 44

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

L'Isac dam on the Nantes-Brest canal

Lock 11 — La Prée

Paudais lock

Nearby routes

Sign up or log in to keep exploring this route

We value your privacy ⛰️

We value your privacy ⛰️