Darkhad Valley

: Darhadyn hotgor) is a large valley in northwestern Khövsgöl aimag, Mongolia.

It was transferred from the People's Republic of Tannu Tuva to the Mongolian People's Republic in 1925 as a Soviet concession to the Mongolians, who had wanted to incorporate the territory of Tannu Uriankhai into their country.

The area is noted for its natural environment, but relatively remote and inaccessible even by Mongolian standards.

[citation needed] The Darkhad valley is divided between the Ulaan-Uul, Renchinlkhümbe, and Tsagaannuur sums.

Jeff Colhoun published a book and made a documentary film about the group Rally for Rangers working to provide park rangers with motorcycles and featured the valley in his documentary Darkhad Valley.