At the point west of Resht, where the direction of the principal range changes to one of N.W.
South of Resht this section is broken through at almost a right angle by the Safid Rud (White river),and along it runs the principal commercial road between the Caspian and inner Persia, Resht-Kazvin-Teheran.
The northern slopes of the Elburz and the lowlands which lie between them and the Caspian, and together form the provinces of Gilan, Mazandaran and Astarabad, are covered with dense forest and traversed by hundreds (Persian writers say 1362) of perennial rivers and streams. The breadth of the lowlands between the foot of the hills and the sea is from 2 to 25 m., the greatest breadth being in the meridian of Resht in Gilan, and in the districts of Amol, Sari and Barfurush in Mazandaran.
RESHT, the capital of the province of Gilan in Persia, in 37° 17' N., and 49° 36' E., on the left bank of the Siah-rud (Black river), which is a branch of the Sefid-rud (White river), and flows into the Murdab, lagoon of Enzeli.