The province has occupied higher mountains land of north and mid-hills of Nepal. It contains Kubi Gangri, Changla and Kanjiroba mountains in north. The Shey Phoksundo National Park with Phoksundo lake is located in this national park. It is the largest national park in Nepal. The Rara lake is the largest lake of Nepal which is also located in Karnali Pradesh. Karnali River is the biggest river of the province which is thought to be the longest river of Nepal. Seti River and Bheri River are tributaries of Karnali.