Mazartag[1] (Uyghur: مازارتاغ,[2] Мазартағ, Mazartagh; Chinese: 麻扎塔格山; pinyin: Mázhātǎgé Shān, Ma-cha-t'a-ko) is an arc-shaped mountain range located in the western part of the Tarim Basin, between the Hotan and Yarkand river valleys, Xinjiang, China.

It is some 145 km long and 3 to 5 km wide; the highest peak rises to 1,635 m. The range is mainly composed of sandstone.

[3] Historical English-language maps including Mazartag: