Háng Đề Chơ - also written Háng Tề Chơ - is a waterfall near the Hmông village of Đề Chơ in Trạm Tấu, on the natural border between the former provinces of Yên Bái and Sơn La. The area is often quoted at around 1,800 m above sea level. The falls drop more than 100 m (some visitors put it at around 130 m) in a white curtain through old forest, and they're often called the Northwest's 'first waterfall' - one of the most majestic, and most dangerous to reach, in the region.
The falls sit beneath the Tà Xùa primary forest, known for its dense stands of pơ mu (Fujian cypress), a highly valuable timber. For years this made the area a hotspot for illegal logging - hard to reach and risky if you ran into the loggers. Today the old logging road is the way in, and the falls are still very wild: no railings, no landscaped paths, just moss-covered rocks, a large pool at the base and forest crowding the stream.
The road in has earned the waterfall a place among the Northwest's 'four deadly' destinations (tứ đại tử địa), and that reputation is a big part of its appeal to adventurous riders.
Since the July 2025 administrative changes, Làng Nhì has been merged into Phình Hồ commune, and Trạm Tấu now belongs to Lào Cai province; many guides still use the old names.