Forest Wonder Lake is a private dam located in Iron County, Wisconsin, with a primary purpose of recreation. Built in 1932, this gravity-type dam stands at a height of 10 feet and has a storage capacity of 270 acre-feet. The lake covers a surface area of 39 acres and is fed by Swamp Creek, offering visitors a serene natural setting for outdoor activities.

Despite its age, Forest Wonder Lake is in fair condition with a low hazard potential, as indicated by a risk assessment rating of Very High (1). The dam is regulated by the Wisconsin Department of Natural Resources (WIDNR), with regular inspections and enforcement measures in place to ensure its safety and integrity. The last inspection, conducted in October 2017, revealed that the dam meets guidelines and is equipped with a controlled spillway.

For water resource and climate enthusiasts, Forest Wonder Lake provides a fascinating example of a historical dam that continues to serve as a recreational resource while prioritizing safety and regulatory compliance. Its location in a picturesque natural setting, coupled with its modest size and low hazard potential, makes it a hidden gem for those seeking a peaceful escape in the heart of Wisconsin's scenic landscape.