Snow lies in some of the gorges all the year round.
These issue in magnificent streams through three gorges in the frontier hills.
Three main valleys, known respectively as Hinde, Gorges and Hobley valleys, run down from this to the east, and four - Mackinder, Hausberg, Teleki and Hbhnel - to the west.
In the Mountain Region and in the Piedmont Plateau Region the rivers have numerous falls and rapids which afford a total water power unequalled perhaps in any other state than Maine on the Atlantic Coast, the largest being on the Yadkin, Roanoke and Catawba; and in crossing some of the mountains, especially the Unakas, the streams have carved deep narrow gorges that are much admired for their scenery.
Water is plentiful in the Elburz, and situated in well-watered valleys and gorges are innumerable flourishing villages, embosomed in gardens and orchards, with extensive cultivated fields and meadows, and at higher altitudes small plateaus, under snow until March or April, afford cool camping grounds to the nomads of the plains, and luxuriant grazing to their sheep and cattle during the summer.