The Great Himalayan National Park (GHNP), comprises 754square Kms. There are two wildlife Sanctuaries, Sainj and Tirthan adjacent to the park. This is the most classical trek in the Great Himalayan National Park, which provides ample opportunity to get introduced to the rare Himalayan Flora and Fauna and different terrains, involving Forests, meadows, streams and  glacier. The trek is very popular among the amateur trekker as well as the serious environmentalists and provides An excellent Opportunity for spotting rare Himalayan Birds and mammals.

Notable mammals include Serow, Himalayan Thar, Goral, Bharal, Indian Pika, Giant Indian Flying Squirrel, Himalayan Black and Brown Bear, Leopard, Red Fox, Himalayan Palm Civet, Yellow Throated Marten, Musk Deer and Snow Leopard. Over 200 bird species have been recorded in theGreat Himalayan National Park that includes spectacular pheasants such as Cheer Pheasant, Himalayan Monal, Koklass, Khaleej Pheasant and the endangered Western Tragopan. Other birds are Black and Yellow Grosbeak, Rufous Breasted Accentor, White Collared Black Bird, Spotted Nutcracker, Red-billed Chough, Eurasian Hobby, Himalayan Griffon and the Lammergeier.