Park before the old French bridge.
(S/E) Head towards it and take the bridge that connects Don Khon Island to Don Det Island. Then take the magnificent track, concreted by China, on the right, with a branch of the Mekong River on your right. Then you're done, just reach the end of the island while enjoying the scenery. On the way, you will pass the old French port, where there are many tuk-tuks (restaurants) nearby.
(1) At this crossroads, continue straight ahead, following the Mekong River to reach the end of the island.
(2) Leave the dirt track on your left and continue to the end of the island: you can stop off to enjoy the hustle and bustle of the old French port.
(3) Turn back and walk about a hundred metres.
(2) Turn right onto the dirt track, which leads back to the car park. Follow the Mekong River on your right to the other end of the island. Ignore the few paths that branch off to the left and lead to houses. You will reach a crossroads.
(4) Continue straight ahead, cross the bridge again, and return to the starting point on Don Khon Island (S/E).