GetLance makes it easy to connect with clients and begin doing great work. Loon Lake Day use is a popular picnicking area and swimming beach on a peaceful lake. The 90-acre lake is mostly surrounded by National Forest System lands. The surrounding landscape is a reminder of the glacial heritage of Michigan. The landscape was deposited and sculpted during the last glacial retreat.As a visitor to the National Forest, you are asked to follow certain rules designed to protect the Forest, natural resources and to provide for public safety of visitors.