You searched for: Place of the southern central portion of the Ottawa Marsh, ca. 180 meters NE of the boat launch. T-3-N, R-15-W, SE 1/4 of NW 1/4 of section 25. Ca. 3.75 miles NE of Fennville, in the Allegan State Game Area Remove constraint Place: of the southern central portion of the Ottawa Marsh, ca. 180 meters NE of the boat launch. T-3-N, R-15-W, SE 1/4 of NW 1/4 of section 25. Ca. 3.75 miles NE of Fennville, in the Allegan State Game Area