Waterways play a vital ecological and geographical role in the Saiha district.
* **Chhimtuipui (Kaladan River):** This major river forms a significant part of the district's boundaries, winding through deep gorges and serving as a crucial water source and a geographic divider. * **Palak Dil:** As the state's largest lake, it acts as a central water body for local biodiversity and is culturally significant to the Mara people.
