La Belle BretagneLa Belle
Bretagne

Randonnée

Circuit du barrage de Guerlédan

Saint-Aignan · Morbihan

Walk

Circuit du barrage de Guerlédan

Saint-Aignan · Morbihan

A demanding 13 km loop from Saint-Aignan, on the south shore of the Guerlédan lake: a church with its Tree of Jesse, the dam and the Sainte-Tréphine chapel.

Suggested time
3 h 15
Type of place
Walking loop · Guerlédan lake
Atmosphere
A lake, forest and industrial heritage.
Getting there
Saint-Aignan (Morbihan)

The route

Loop: the route returns to its starting point. Route: Pontivy Communauté, Licence Ouverte 2.0.

Download the GPS track

GPX file, to open in a walking app (Komoot, OsmAnd, Garmin Connect, iPhiGéNie…).

Who this place suits

With family
3/10
As a couple
7/10
With friends
9/10
Solo
8/10
With a dog
8/10
Reduced mobility
0/10

These scores are calculated from what the page records: official rating, facilities, difficulty, duration and location. They are a guide, not a substitute for contacting the venue, especially about accessibility.

About

From the south shore of the Guerlédan lake, panoramic views open onto a drowned valley: building the dam in 1930 flooded 17 locks on the Nantes to Brest canal. The 15th century church in Saint-Aignan keeps two 16th century carved altarpieces, one of which bears the finest Tree of Jesse in the area. The Électrothèque, a museum of electricity, tells the story of how the dam was built. After the Saint-Trémeur spring, you reach the dam: 45 m high, 206 m long, holding 55 million m³ of water over 400 hectares. The Sainte-Tréphine chapel, from 1897, offers a fine panorama, before the Pouldu wood and the view over the Sordan cove. The loop is 13 km long; allow about 3 h 15 of walking. The stated level is demanding. Start: the church car park in Saint-Aignan. The official route, published by Pontivy Communauté, is shown on the map and can be downloaded as a GPX file to follow on your phone. The route is listed in the département’s official walking route plan (PDIPR).

What you will see

  • 13 km, about 3 h 15
  • Level: demanding
  • Loop: back to the starting point
  • Saint-Aignan church and its Tree of Jesse
  • Électrothèque
  • Guerlédan dam
Show 2 more points
  • Sainte-Tréphine chapel
  • Sordan cove

Tips on the spot

  • Start: the church car park in Saint-Aignan.
  • The GPX track can be downloaded from the map: handy for staying on the right path at junctions.

Frequently asked questions

How long is the walk?

13 km, or about 3 h 15 of walking.

Where does it start?

Saint-Aignan church car park. The route comes back to its starting point.

Source: Pontivy Communauté, Licence Ouverte 2.0, via GeoBretagne.

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Traveller reviews

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