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Bike touring routes & trails

Montertelot Lock – Lac au Duc loop from Allée couverte de Trélan

Bike touring routes & trails

Montertelot Lock – Lac au Duc loop from Allée couverte de Trélan

Hard

4.3

(6)

20

riders

Montertelot Lock – Lac au Duc loop from Allée couverte de Trélan

04:39

77.8km

550m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: April 10, 2026

Waypoints

A

Start point

Parking

Get Directions

1

6.84 km

Le Roc-Saint-André

Highlight • Settlement

Quaint village with an ancient church on a hill overlooking a bend in the river & Canal de Nantes à Brest.

Tip by

2

7.58 km

Former railway bridge over the Nantes–Brest Canal

Highlight • Bridge

Nice crossing of two long-distance cycle routes: the Vélodyssée coastal route which runs along the Nantes to Brest canal and the track between Saint-Malo and Rhuys which takes the old railway bridge.

Translated by Google •

Tip by

3

9.66 km

Montertelot Lock

Highlight • Structure

Chapel of an old monastery right next to the canal and a small park to rest or camp at night

Translated by Google •

Tip by

4

19.1 km

Lac au Duc

Highlight • Lake

Created by monks in the 12th century, Lac au Duc is the largest of Brittany's inland lakes. Its 250 hectares extend between Ploërmel, Taupont and Loyat.

Measuring approximately 5.5 km …

Translated by Google •

Tip by

5

19.4 km

Dukes' Lake

Highlight • Other

perfect stopover for hikers at the campsite with swimming in the lake.

Translated by Google •

Tip by

28.4 km

Forêt de Ploërmel

Forest

7

61.9 km

Greenway crossing over the Arz

Highlight • Other

Passage of the old railway line (now greenway) above the Arz. Quite high and impressive.

Translated by Google •

Tip by

B

77.8 km

End point

Parking

Way Types & Surfaces

Way Types

58.9 km

16.5 km

1.49 km

649 m

222 m

107 m

< 100 m

Surfaces

69.6 km

7.04 km

1.11 km

118 m

< 100 m

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Elevation

Elevation

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

Highest point (100 m)

Lowest point (20 m)

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Weather

Powered by Foreca

Sunday 17 May

13°C

8°C

82 %

Additional weather tips

Max wind speed: 18.0 km/h

to get more detailed weather forecasts along your route

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

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