The river originates near Sobaeksan Mountain in the Nanglim Mountains east of Ganggye-gun, North Pyongan Province and flows northwest into the Yalu River.

These events were later processed in numerous books and films, for example “On the Banks of Tongro-gang” (독로강 기슭에서 Tongro-gang kisŭlgesŏ) by Kim Hak-yŏn from the Year 1951.

During the first five-year plan (1957–1961), a hydroelectric power station with a capacity of 90 megawatts was built on Tongro-gang.

The Tongro-gang valley is the region's most important growing area.

This article related to a river in North Korea is a stub.