Guian province whose area is 14711 km 2 has been sepreated from Mazandaran province at east by sefid Tameshk river in between of chaboksar and from Republic of Azerbaijan at west by Astarachay river .Alburz MTs with the average height of 3000 meters , is expended like a wall to the east and south of guilan .the highest summit in guilan is somamouse summit with the height of 3678 metters (sum souices said 3620 meters ) located in Roodsar township which is the highest summit of Alburz MTs after Damavand summet with the height of 5610 meters . guilan has the mild Mediterranean climate that is caused by interference of mountainous weater and the caspaian sea weater . this province is also called Rain provinece due to much raining . guilan climate enjoy humidity at very high degree.
Guilan has a very rich culture which originates from 7000 years ago . it is introduced (varena) in avesta and Greece called it with the name of an Iranian native folk before the intrance of Aryans that is kadoosian. New folk were created with the association of immigration of Aryans and other folk of guilan . the most important of these new folk were Gilak and Deilam