While Namchi sits high on a ridge, the district's geography is shaped by major Himalayan rivers in the valleys below.
* **Rangeet River**: The major river flowing through the Namchi district. It is a vital water source and, downstream, becomes a popular destination for white-water rafting and riverside camping. * **Waterfalls**: During the monsoon season, numerous unnamed, seasonal waterfalls cascade down the hillsides surrounding the city.