South Lake, also known as Quail Lake, is a picturesque reservoir located in Colorado Springs, Colorado. Managed by the local government, this earth dam structure was completed in 1973 and serves multiple purposes including flood risk reduction, irrigation, and recreation. With a maximum storage capacity of 583 acre-feet and a normal storage of 319 acre-feet, South Lake covers a surface area of 33 acres and is fed by the Fountain Creek-TR river.

With a dam height of 60 feet and a hydraulic height of 52 feet, South Lake has a spillway width of 29 feet and an uncontrolled spillway type. The dam is classified as having a high hazard potential but is currently in satisfactory condition according to the last inspection in March 2020. The reservoir offers opportunities for outdoor activities and is a popular spot for recreation in the area. Despite its moderate risk assessment, South Lake remains a vital water resource in El Paso County, Colorado, providing essential services to the community while also being a scenic destination for water resource and climate enthusiasts.