Jack the Horse Lake is located in Itasca County, Minnesota. This lake is 363 acres in size. It is approximately 45 feet deep at its deepest point. When fishing, anglers can expect to catch a variety of fish including Black Bullhead, Bluegill, Brown Bullhead, Largemouth Bass, Northern Pike, Rock Bass, Walleye, Yellow Bullhead, Yellow Perch, Pumpkinseed and.