United States, Minnesota, Cass, Chippewa National Forest / Leech Lake Indian Reservation. Cass Co. T143N, R30W, SW1/4, Sec. 14. Isthmus, just N of the S end of Otter Tail Pt. E side of isthmus near the boat d Cass Co. T143N, R30W, SW1/4, Sec. 14. Isthmus, just N of the S end of Otter Tail Pt. E side of isthmus near the boat dock.. 143N 30W 14