All activities / Trekking / Hiking / Phong Nha
Trekking / Hiking in Phong NhaVN
The UNESCO karst park where jungle treks end inside the world's largest caves, camping on underground beaches.
Why here
Phong Nha-Ke Bang is the world's greatest cave region, and the way in is on foot: multi-day jungle treks through UNESCO-listed karst where the campsites are inside the caves themselves, tents pitched on underground beaches beneath dolines that pour jungle light into caverns big enough to hold city blocks. Oxalis Adventure, the sole licensed operator for Son Doong, the largest cave passage on earth, also runs the more attainable Hang En and Tu Lan treks with a safety team trained by British cave experts; Jungle Boss runs licensed routes to Do Quyen waterfall and the Hang Pygmy system. This is expedition trekking where the destination happens to be underground, and nothing else in Southeast Asia resembles it.
Best months
February to August is the season; most cave routes close from roughly mid-September to December when flooding fills the river passages. Son Doong itself books out a year-plus ahead at expedition prices; Hang En and Tu Lan are the accessible versions. Jungle humidity and river crossings are constants.
Getting there & around
Fly or train to Dong Hoi, 45 minutes from Phong Nha village. Treks are operator-run only, with porters, cooks, and safety crews included; independent trekking to the caves is not permitted.
Skill levels: intermediate, advanced
Schools & guides (2)
Jungle Boss Tours
OutfitterLicensed local operator running jungle-and-cave treks to Do Quyen waterfall, Tra Ang, and the Hang Pygmy system on routes separate from Oxalis's concessions.
Oxalis Adventure
OutfitterThe sole licensed operator for Son Doong, running Hang En, Hang Va, and Tu Lan expedition treks with a safety team trained by British cave experts.