The morning cycle begins with an hour of vehicle transfer on the coastal road to Xuan Tho, near Song Cau market, for the morning mountain biking - 35 km. The roads are small paved, passing lush fields and country farms, then undulate through mountains, jungles, rolling small hills, and then go along the sleepy River to La Hai. Enjoy a snack and fresh fruits, and look over the French colonial railways running north to south. Next, we turn left and ride down the tarmac road. The road parallels the river and train line. We undulate the road and ride more down than up to Chi Thanh, where is your lunch setting. 

The afternoon ride is from Chi Thanh; we follow the country road, through lush farmlands and peaceful rivers, and make an agriculture Dam. We continue to enjoy the ride on the gentle roads through eucalyptus, tiny town, and rice paddy fields to Da Dia reef. Ganh Da Dia is a natural rock reef - a geological wonder of interlocking basalt rocks. The area is about 100 meters wide and 250 meters long, with an estimated 35,000 columns of basalt rocks. The stones are in different sizes and shapes - some are round, and some have sharp angles forming polygons. 

Then we return on the bikes and ride to a local beach nearby to enjoy coffee, get some fresh fruits, and bike on narrow paths to fishing hamlets. View the coastal countryside scene, looking over a hundred floating fish farms, and we will explore the O Loan lagoon with brackish water all year round, locals farm many oysters, shrimp, seaweed, scallops, and so on. A lagoon is also an excellent place for storks and birds to hunt for food. We'll end up the ride in Tuy Hoa town and had a transfer to Nha Trang in the late afternoon.