Combined, the Inland Waterway, Brill, Williams, Lossing-Harrington, Kreag Family, and Ponshewaing preserves protect more than a half-mile of Crooked Lake and Crooked River frontage just upstream of the Crooked River locks on the edge of Alanson. 1,500 feet of frontage along US-31 protects the area's scenic wooded character just south of Alanson's village.
Ten acres of northern fen extend along the lake frontage on the Inland Waterway Preserve, vegetated with sedges, grasses, and shrubs. The remainder of the preserves consists of a rich conifer swamp dominated by northern white cedar.
There is only one short trail on this preserve complex. Starting from the gate on Lake Street in Alanson, the quarter-mile route will take you to a scenic spot on the Crooked River. Although there is no boat landing site on these preserves, a gravel-surfaced, limited depth boat launch site is located at the end of Lake Street near the Crooked River locks, providing an access point paddlers to enjoy the scenic lake frontage of these preserves.
From the intersection of US-31 and M-68 in Alanson, go south 0.3 miles. Turn left on West Street and go one block. Turn right on Lake Street and go 0.3 miles. There is no formal parking area, but there is room to park along the road near the gate.