Sylvan Lake (South Dakota)
General data
- Name: Sylvan Lake (South Dakota)
- Water system: Missouri River
- Water type: Artificial lake
- Progression: Sunday Gulch Creek -> Spearfish Creek -> Redwater Creek -> Belle Fourche River -> Cheyenne River -> Missouri River -> Mississippi River -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America