Grass Lake (Simplified/Traditional Chinese: 草海; Pinyin: Cǎo Hǎi) is a lake at Rize Gully in Jiuzhaigou Valley. It is high up in the Jiuzhaigou Nature Reserve, at an elevation of about 2910 meters above sea level. Grass Lake, as its name indicates, is covered with swaying tall native grass. This shallow lake often attracts swimming water birds.
An appealing feature of the Grass Lake is the changing colours of the grass. In spring the grass is glossy green. Then in summer, the grass blooms. By autumn, the grass starts to turn yellow, while in winter, the lake is a spotless pure white.
Another view of Grass Lake in Jiuzhaigou (17 October, 2005)