Castle Rock Lake is an artificial lake on the Wisconsin River. It is located in central Wisconsin in Adams County and Juneau County. The lake has an inflow from Petenwell Lake, Yellow River, Big Roche a Cri., and Klien Creek. It has a surface area of and its depth varies from in most places, with area in the old river beds reaching as deep as .
Castle Rock Lake is the fourth largest lake in Wisconsin, it covers sixteen thousand acres, and has approximately seventy miles of shoreline. Castle Rock Lake is home to a large variety of fish, birds, and many other organisms. The large body of water attracts many people to the area as well, it provides a great space for recreational hobbies such as: bird watching, boating, fishing, and recreational water sports.
Castle Rock Lake is situated within the ancient bed of Glacial Lake Wisconsin. Prior to the completion of the Castle Rock Dam in 1951, the area held farmlands, vast prairie