Lot 18 WILLOW BAY, Gladwin, MI 48624, Gladwin, MI, 48624 is has 0 sqft. of livable floor space. This listing for sale has 0 bedrooms, and 0 baths. Lot 18 WILLOW BAY, Gladwin, MI 48624 is a 168,142 size lot located in Gladwin is active on the market for $18,900. This listing for sale is located in Gladwin in the zipcode 48624.