A pilgrimage to Timmersain in Uttarakhand’s Chamoli district where ice Shiv Lingas form naturally in a cave atop a hill during winter will begin from Thursday on the lines of the Amarnath Yatra. The decision to start the Timmersain Mahadev Yatra from April 7 was taken after a meeting with the Border Roads Organisation, Indo-Tibetan Border Police and local people at the collectorate chaired by District Magistrate Swati Bhadauria on Monday.