The district sits where the Red River gorge meets the Tay Con Linh massif. West of Hoang Su Phi town, the Chay river cuts a deep valley through La Chi terrace country. East and north, ridges climb through bamboo, rhododendron and cardamom forest toward the 2,402 m summit of Chieu Lau Thi.
Elevation ranges from roughly 700 m in the river valleys to above 2,400 m on the upper ridge. That spread means weather changes quickly — warm afternoons in the terraces, cold nights above 1,500 m, and fog that can lift or settle within an hour.
Seasonally, the landscape shifts from flooded mirror terraces in May and June to harvest gold in September and October, then to bare stone and woodsmoke in the cold months. March and April bring plum blossom above stone-walled villages.