West of the county line, M-37 meets and merges with M-46 along Apple Avenue. The two highways separate at a roundabout junction where M-37 turns north on Newaygo Road. M-37 passes Half Moon Lake and through Bailey. In recent years the highway has served as the location of West Michigan's Longest Yard Sale which spans about of the route starting in the Bailey–Grant area of Newaygo County through northern Lake County. Between |Grant and Newaygo, the farms transition to forest. M-82 follows M-37 through downtown and across the Muskegon River. The highway continues north along Evergreen Drive between Emerald, Sylvan and Twinwood lakes. This area is where M-37 crosses into the Manistee National Forest. M-20 follows M-37 through downtown White Cloud and over the White River. Further north, the road passes through Brohman and Lilley in the northern end of the county.