|Athletes run at the 2018 Halong Bay Heritage Marathon. ( File Photo)
The annual event is one of the biggest international marathons in Vietnam.
This year, apart from local marathoners, more than 1,600 foreigners have registered for the race.
It aims at creating a healthy and positive environment where running enthusiasts can challenge themselves, meet and share experiences over different routes ranging from 5km to 42km, including a track for children.
The special track offers runners a unique course across Bai Chay Bridge, the longest single span bridge in Southeast Asia. Runners will have the chance to enjoy spectacular views over the magnificent landscape of the bay as well as picturesque mountains and coast lines.