Which pass separates Mandi from Kullu?By Rahul Bhandari - October 12, 2019 0 Dulchi PassDescription: Dulchi Pass is one oldest and important Pass that connect Mandi with Kullu region of Himachal Pradesh. Dulchi Pass is situated at an altitude of 2,788 metres. With new roads connectivity, now a days, Dulchi Pass isn’t used much.