Water is a defining force in the geography and culture of Kullu.
* **Beas River:** The lifeblood of the valley, the Beas cuts directly through Kullu town. Its cold, fast-flowing waters support the region's agriculture, hydroelectric projects, and adventure tourism. * **Parvati River:** Meeting the Beas near Bhuntar (just south of Kullu), this turbulent, emerald-green river carves out the stunning Parvati Valley. * **Tirthan River:** A pristine, undammed river in the broader district, famous for trout fishing and leading into the Great Himalayan National Park.