On Île aux Moines, to avoid getting lost, there are several markings on the ground to guide you.
For this hike, follow the yellow paint marks.
(S/E) At the Ile aux Moines port pier, walk along the quay towards the village via the small road.
(1) Just before entering the village and before starting the short climb, leave the road and take a small path on the left between two houses where there is a round road sign prohibiting access (I think it's for bicycles, but check to be sure).
Follow the small path to cross Rue de la Grimpette, then continue straight ahead. When you reach the junction with Rue de la Mairie, turn left.
Continue straight ahead to the end of Pointe du Trec'h. On the road, you will pass a large monument in the form of a cross.
At Pointe du Trec'h, you will find a tiny harbour. Stop here to admire the Gulf of Morbihan, slightly to the left opposite, Pointe d'Arradon, straight ahead a few small islands, and further to the right, Île d'Arz.
(2) From the slipway, continue along the coastal path that goes around the Pointe du Trec'h. The path passes narrowly between a cliff and stacked fish traps. As you continue, you will see a number of oyster farms (at low tide, I think). Reach Port Miquel.
(3) Leave the seafront and turn right up a flight of steps. Immediately afterwards, take the path on the left under the trees. This is Rue Beg Moussir. Pass in front of an oyster farm, join a narrow street and continue straight on until you reach a chapel.
When you reach it, turn left and stay on Rue de l'Église (do not take the alleyway that branches off to the left shortly after the chapel). At the end of Rue de l'Église, you will find yourself in the centre of the village, where there is a square. Cross it diagonally and, at the end, do not turn completely right but take the alleyway straight ahead, which is Rue du Commerce.
You will then reach Rue de Bindo, where you continue to the left to arrive almost immediately at Rue Neuve.
(4) Turn right to go down towards the port and return to the first crossroads.
(1) Turn left and follow the same route back to the pier (S/E).