From the D30, head towards the lake, arriving at Saint-Cadou, until you reach the small car park.
(S/E) Take the path on the right to reach the lake.
(1) Cross the floating footbridge and stay by the lake, heading north-west.
(2) At the water sports centre, turn right, then left 50 metres further on. Pass north of the tennis court and return to the lake shore.
(3) After the campsite, turn left onto the road, then leave it by turning left 100 metres further on.
(4) At the hamlet of Kerret, stay on the path by turning left, still along the water's edge. Continue to Le Drennec.
(5) Turn left onto the road to reach the lake dam and cross it.
(6) At the end of the dam, follow the path to the left and head to the car park (S/E).