St. Clair's Falls, Mountainous waterfall in Talawakelle, Sri Lanka.

St. Clair's Falls is formed by two cascades on the Kotmale Oya: Maha Ella, about 80 metres high and 50 metres wide, and Kuda Ella, about 50 metres high, immediately downstream. The water drops over three rock outcrops into a large pool within a tea estate.

The falls take their name from a tea estate on the Kotmale Oya, a tributary of the Mahaweli River. From the start of the Upper Kotmale Hydropower Project, environmentalists protested that the dam, 2.2 km upstream, threatened the falls; the government undertook to release 47,250 cubic metres of water daily for 10 hours and 30 minutes between sunrise and sunset.

The falls take their name from the tea estate whose slopes the Kotmale Oya crosses before dropping over the rock outcrops. The Sinhala names of the two sections, Maha Ella and Kuda Ella, are used locally for the greater and lesser falls.

The best vantage point sits along the main road passing through the area, offering a clear sightline to both cascades. Parking spaces are available nearby, making it straightforward to stop and view the falls without difficulty.

St. Clair's Falls lies 2.2 km downstream of the Upper Kotmale Dam, and the project's opponents argued from its start that the dam threatened the falls. The government committed to releasing 47,250 cubic metres of water daily so the falls keep flowing for 10 hours and 30 minutes between sunrise and sunset.