A youth from Shimla's Narkanda has gone missing from the challenging Manikaran-Kheerganga-Mantalai trek in Parbati Valley of the district. The Manikaran police station received information yesterday that Sahil (28), a resident of Kandayali village, who had gone on the Kheerganga-Mantalai trek, along with his friends, had gone missing from near Tunda Bhuj on May 13.