The Kirthar Mountains are a mountain range that mark the boundary between the Pakistani provinces of Balochistan and Sindh, also separating the Iranian plateau from the Indian subcontinent. It comprises much of the Kirthar National Park. The mountain range forms part of the Kirthar-Sulaiman geological province, which stretches from the Arabian Sea coast north to the Sulaiman Mountains in northwest Pakistan. The highest peak of the Kirthar range is Zardak Peak at 7,430 ft (2,260 m).