| South Cascade Lake | |
| Basin Countries: | United States |
| Coords: | 48.3711°N -121.0678°W |
| Elevation: | 5297feet |
| Islands: | none |
| Pushpin Map: | Washington#USA |
| Pushpin Map Alt: | Location of South Cascade Lake in Washington, USA. |
South Cascade Lake is a glacial lake in Washington. It is the source of the South Fork Cascade River. It is fed directly by the meltwater of the South Cascade Glacier.