where is lake wilhelm
Lake Wilhelm, Pennsylvania, USA. Add a Lake Photo! Lake Wilhelm was created in 1971 with the damming of Sandy Creek for flood control purposes. Lake Wilhelm is a shallow lake with a maximum depth of about 24 feet at the dam. It has a surface area of 2,800 acres. Lake Wilhelm is located in Maurice K. Goddard State Park in Mercer County Pennsylvania, about 15 miles west of Franklin, Pennsylvania.