Located in Caroline County, Smithville Lake was formed when a dam was constructed across the Marshyhope Creek. It is small and shallow with the surface area measuring 43 acres and its depth at 8 feet. Boating and fishing are allowed on the lake but swimming is not. Along the eastern shore is the Smithville Lake Community Park where other types of activities are available. Bluegill, bass, crappie, and catfish are some of the freshwater fish commonly found here. The lake is settled in a very rural area with tree-lined farm fields and small wooded areas along the shore. Aquatic vegetation dominates most of the lake of both emergent and submerged types.