It is still a typical winding road with many slopes ending at the romantic Tram Me ferry, but there are many improvements to bring the best experience to all runners. 42.195km distance runners start at Phong Nha Ke Bang Town Tourist Center. With the total length of the route is 36km, of which there is only about 6km of running repeat. Immediately after starting, runners will have a chance to run along the flowing Son River across town, then towards the road leading to the center of Phong Nha-Ke Bang National Park. And the running repeat track after the historic bridge of Tra Ang, runners can still experience the road going deep into the core of Truong Son forest - the most beautiful path through the forest with primeval forest, rocky cliffs, moss, and the early sun rays. Still going through full of historical monuments such as 8 Ladies Cave, and Nurse Cave. However, do not be subjective when participating in the distance. hey, because the total cut-off time of the full marathon is 7 hours, which means you have to make sure the average speed is at pace 10. If you spend time taking pictures, climbing slopes, or resting for too long, you will be at risk of being cut off at Cp4 (06:45 am), Cp9 returning (9:00 am), Cp7 returning (09:45 am) and Cp13 (11:20 am).