The Freiberger Mulde is the right-hand, 124-kilometre-long headstream of the River Mulde, whose catchment covers an area of 2,981 km² in the Czech Republic and Germany in central Saxony. It has a volumetric flow of 35.3 m³/s which is greater than that of the other headstream, the Zwickauer Mulde who flow is about 26.4 m³/s, which is nevertheless the longer stream.The source of the river is in the Ore Mountains, near Moldava, in the Czech Republic. It runs northwest, crossing the border with Germany after a few km, to Freiberg, and further northwest through Nossen, Döbeln and Leisnig. A few km north of Colditz, the Freiberger Mulde is joined by the Zwickauer Mulde to form the Mulde. The Mulde is a tributary of the Elbe.