Miass is one of the most important rivers of the Chelyabinsk region and the main river of Chelyabinsk, the largest tributary of the Iset River. The length of the Miass River is 658 km, exceeding the length of the Iset itself (606 km). The length of the river in the Chelyabinsk region is 384 km (the longest in the region).
I suggest you to listen to the legend about the Miass River!