As US 31 curves around to the northeast and east in Charlevoix County, it follows a section of the Lake Michigan shoreline that is not considered to be part of any bay. The highway continues through Northern Michigan agricultural areas to the southeast of Charlevoix.
As US 31 bends to the northeast and east in Charlevoix County, it traces a portion of the Lake Michigan shoreline that is not part of any bay. The highway proceeds through Northern Michigan agricultural regions to the southeast of Charlevoix.