Starting point: Chapelle des Trois Fontaines chapel on the edge of the D785 leading to Pleyben.
(S/E) Take the small road, leaving the chapel and its damaged calvary on your left.
(1) At the three-way junction (cross), follow the road that climbs to the right towards Kernevez, Kerlann and Ty Ridou. Continue along this road, passing Kerzerrien and Pennaguer. On your left, you will see the summit of Karreg an Tan.
(2) After Kerarmet, when you reach the road from Edern, turn left. At the cross, turn left to reach the car park, the starting point for the climb.
(3) Begin the climb along the well-marked path. The climb is relatively short. There are steps just before the summit. At the top, there is a vast panorama of the Châteaulin basin and the Monts d'Arrée to the north.
(4) The descent follows a small path marked in places by yellow and orange markers. The route is not always obvious as there are many variations used by mountain bikers. Keep to the path that goes to the left and goes around a coniferous forest.
(5) Turn left at a 90° angle, pass between two coniferous woods and turn right to descend straight down a small road.
(6) Turn left and follow this road, which leads back to the starting point via Ménez Crenn and Baradozic. Return to the fork in the road from the outward journey.
(1) Head to the nearby chapel (S/E).