Long years ago,an assasin named Hasan-Sabah made a group of assasins,mercenaries in this castle.They ruined to villages for kidnapping/murduring important people of those days.If you stay in Qazvin or Rasht is well a worth day  hiking.The way to Alamut Castle twists and turns,with mountains splendid by fruit trees,specially cherry trees and red rocks.Alamut castle is at 73km northeast from Qazvin.One of the easiest ways to get to castle is by hiring 4WD car.