| Er Lake / Erhai | |
|---|---|
 | |
  Er Lake / Erhai | |
| Location | Dali City, Dali Prefecture, Yunnan |
| Coordinates | 25°45′48″N 100°11′15″E / 25.76333°N 100.18750°E |
| Basin countries | China |
| Max. length | 40 km (25 mi) |
| Max. width | 8 km (5.0 mi) |
| Surface area | 250 km2 (97 sq mi) |
| Average depth | 11 m (36 ft) |
| Water volume | 2.5 km3 (0.60 cu mi) |
| Surface elevation | 1,972 m (6,470 ft) |
Erhai or Er Lake (Chinese: 洱海; pinyin: Ěrhǎi), is an alpine fault lake in Dali City, Dali Prefecture, Yunnan province, China. Erhai was also known as Yeyuze (叶榆泽) or Kunming Lake (昆明池) in ancient times.