Covers 22,000 hectars of mostly densely forested, very steep terrain, at between 600 meters and 1,850 meters elevation. Picturesque villages, mostly growing lowland irrigated paddy flank part of the northern and eastern boundaries of the area. Ecotourism lodges are being set up in five of these villages.
Easy trekking along the ridge lines to the Northeast and Southeast, or more vigourous treks along the Jurassic escarpment (about 30 kilomaters to the west of Phongsaly on the Boun Neua Road), or along the foot of the escarpment (KM 37, take off to the south through forest and paddy fields on the new Nam Boun Kao Trail). Ou River, situated between Phongsaly downstream to Pak Ou in Luang Prabang, has wonderful scenery on both sides of the river. Nong Khiaw is also a beautiful stopover along the way, good for camping on the sandy beach of the river.