Preston Lake, located in Brownton, Minnesota, is a local government-owned water resource with a primary purpose of recreation. The lake has a dam with a height of 7 feet and a storage capacity of 1800 acre-feet. With a surface area of 678 acres and a drainage area of 14.4 square miles, Preston Lake provides a picturesque setting for outdoor activities such as boating, fishing, and picnicking.

Despite being classified as having low hazard potential, Preston Lake is assessed to be in fair condition as of May 2009. The dam structure consists of buttress core types with an unlisted/unknown foundation. The last inspection conducted on the lake's facilities was in May 2018, with an inspection frequency of 8 years. In the event of an emergency, the lake has protocols in place to ensure public safety, although detailed emergency action plans are not explicitly stated in the available data.

Overall, Preston Lake offers a tranquil environment for water resource and climate enthusiasts to enjoy various recreational activities. With its scenic location, ample storage capacity, and low hazard potential, the lake serves as a valuable asset for the community of Brownton, Minnesota, and a potential area for further exploration and appreciation of the natural environment.