Hongshan Reservoir, Artificial lake in Xixiu District, Anshun, China

Hongshan Reservoir is an artificial lake in the heart of Guizhou Province, covering about 54 hectares and stretching roughly 2 kilometers long. Water is contained by dikes that form the lake, and pathways, bridges, and picnic areas are scattered throughout the grounds.

The lake was completed in 1958 and reached full capacity in 1959 as part of water management efforts on a tributary of the Dabang River. In 2017, it gained national 4A scenic status, transforming from a simple water storage facility into a destination for visitors.

The reservoir is also known as Hongshan Lake (虹山湖), and in November 2017 it was listed as a national 4A-level scenic area. The name Hongshan, "Rainbow Mountain", is the one locals use for the lake and its surrounding park.

The grounds are easiest to reach from Anshun city center, and pathways are designed so most visitors can navigate easily. Tree-lined walkways and marked trails help you find your way, and plenty of shaded spots offer places to rest.

The reservoir's dam road and viewing steps were the site of the Anshun bus crash on 7 July 2020, when a bus carrying students sitting the gaokao plunged into the water, killing 21 people and injuring 16. The incident is among the deadliest road accidents in Guizhou's recent history.