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Car park at the Lac du Drennec water sports centre.
Yellow signposting.
(S/E) From the car park, head left towards the beach and follow the wide, compacted path which begins the walk around the lake. Several paths leading to parking areas branch off to the left.
(1) Cross a footbridge and reach a car park where the route leaves the lakeside.
SignpostedGR®®380(white and red).
(2) Cross the road and head up the steps into the woods opposite. Follow this shaded path.
(3) Pass the road on your right leading to Roz ar Hoël farm (sign indicating the sale of organic produce). Continue along the stony path on the left, which passes through a pine woodland.
Join the small road leading to the village of Saint-Cadou, in the municipality of Sizun; turn right and head towards the village. At the entrance to the village, note on the left an imposing covered washhouse which could accommodate ten people working whilst standing. Take a detour to the right to see the church and the old clock on the bell tower.
(4) Retrace your steps, then head straight ahead onto the Route de la Fontaine, a stony track, which after about 300 metres leads to the Saint-Cadou Fountain. Retrace your steps again and turn left onto the Route des Carrières. This wide stony track runs alongside old slate quarries that are now overgrown with vegetation. On the right, you can see a rocky outcrop: Rocher de Caranoët (300 m).
(5) After passing under the high-voltage power line, theGR®® meets a path called Chemin du Comte and continues in a west-south-westerly direction. Join a small road, follow it to the right towards the D342, let theGR®® continue to the left and turn right at a place called Croas-Oannec.
Yellow markings.
(6) Immediately take a narrow path on the right. Look out for it amongst the ferns and follow it. You’ll reach the D342.
(7) Follow it for a few metres to the right and turn left onto the small road that crosses the D130. Continue straight on, reach the hamlet of Labou and turn right, still following the yellowPR®® signs.
(8) After the hamlet, continue along the same path which leads to the D30; go round it on the left. Continue along this small road for about 300 m.
(9) At the signpost, head down to the right towards an old fountain and washhouse. Carry on and cross a small ford
(10) At the next crossroads, turn left. This section of the route is undergoing significant changes due to tree felling and trees felled by the storm in March 2017. Continue along this path, which has been considerably widened by the works, and follow the old leat of the Moulin du Bois.
(11) Turn right to cross the River Elorn via an old arched bridge. The date 1860 is engraved on the pediment. It is worth heading down to river level on the left to enjoy the view of the bridge. Shortly afterwards, thePR®® joins the GRP® °®°° des Monts d’Arrée.
Yellow and red markings.
(12) Follow this path to the right, passing through the hamlet of Kerambloc’h. Continue on to reach the Kérinizan equestrian centre, which you go round to the left.
(13). Continue along this small road as it descends, then turn right onto a path passing near an old pumping station.
(14) Just before the INRA Experimental Fish Farm in the Monts d’Arrée (PEIMA), turn right, leaving theGR®® to continue on. Cross the River Élorn via a small bridge made of three long slate slabs and turn left.
Yellow markings.
(15) Follow this path through the woods, which initially runs alongside the fish farm before moving away from it. Reach the path leading to the dam’s embankment. Note the small hydroelectric and solar power station at the foot of the dam.
(16) Cross the dam embankment to the left: there is a view of the lake and, in the background, the village of Commana, recognisable by its distinctive bell tower. At the end of the embankment, turn right to begin the walk round the lake (information boards).
(17) Begin your walk around the lake by following the path that skirts it to the left. Along this section, numerous information boards provide details about the lake and help you orientate yourself along the route. There is a view of the lake, with the ridgeline of the Monts d’Arrée in the background.
(18) At the junction with the road, turn right, then right again 100 metres further on to rejoin the path running alongside the lake, which leads to the water sports centre car park (S/E).
Visorando Member
Easy 
Local authority
Difficult 
