Long Hai Mountains
Turn right at the roundabout for Metro turn-off on the main highway to Ba Ria. Go through Long Hai town then left, right, left, left at roundabouts basically following the road around the bottom of the mountains and keeping the ocean on your right.
Continue about 7 km past the end of town and tourist resorts to the Minh Dam Base turn-off on the left.
There are at least three good trails up into the mountains from the car park about 2 kilometres up this road - and the views from the mountain peaks are superb!
There's another good trail even before the Minh Dam Base. Disembark at the new pagoda about 2 km on left before Minh Dam Base (about 5 km past Long Hai and after the resorts - blue signpost on lefthand side of road at pagoda entrance: "Thien Vien Truc Lam Chan Nguyen").
Follow steps/rocks up hill to left of pagoda (if large gate closed, go towards pagoda until past the gate then move over to track on the left). Walk past monkey area and up steps in hill. Continue up, up, up until eventually going past small houses then continue climbing to more houses then large "double rocks" to the right with narrow gap between them (top of mountain).
Go through the gap and continue across the ridge, then steep downhill towards Minh Dam Base. Eventually emerge on same track as used by the trails leading uphill from the car park, which is an excellent location for Down Downs!
There are also other trails out of Long Hai township, ie long before Minh Dam Base. These will hopefully be covered in more detail by the relevant Hares as this site continues to develop.