STS51B-038-0052 Otter Tail Lake, Minnesota, U.S.A. May 1985 Otter Tail Lake [12 miles (19 kilometers) long] is the largest of the lakes featured in this southeast-looking, low-oblique photograph of west-central Minnesota. These lakes were formed more than 10 000 years ago as glaciers from the last ice age retreated northward. Visible are light green Christina Lake (right center of the photograph) and Miltona Lake and Ida Lake (near top center), north of Alexandria (not discernible). Excellent fishing in area lakes brings visitors from all over the United States to this region.