Description: This is one of the most exclusive treks in the core areas of the National Park which gives exclusive insight to the uniqueness of The Great Himalayan National Park. We start our journey from Rolla in Tirthan Valley and end it at Niharni in Sainj Valley. This trek gives great opportunities for observing the exclusive biodiversity of this National Park. This trek cover major spots of the National park from Rolla, Shilt, Rakhundi, Ghumtarao in Tirthan Valley to Dhel, Humkani & Niharni  in Sainj Valley.