 M @-@ 18 begins about 20 miles ( 32 km ) northeast of Mount Pleasant at the North Bradley interchange on US 10 in rural Midland County . The highway runs due north through woodlands that are a part of the Au Sable State Forest and into Gladwin County . The trunkline enters the community of Beaverton and turns northwest to cross the section of the Tobacco River known as Ross Lake . Continuing northwesterly , the road runs along a section of the lake and then turns back due northerly . North of Beaverton , M @-@ 18 runs through some farm fields as it approaches the county seat of Gladwin . The highway runs through the southwestern outskirts of town near a golf course as it approaches a junction with M @-@ 61 . M @-@ 18 merges with , and runs concurrently along , M @-@ 61 eastward into town on Cedar Avenue . At Silverleaf Street , M @-@ 18 turns back north near the airport . M @-@ 18 continues northward out of town back into farm country . 
