Wisconsin State Route 80 is a north-south highway along the eastern county line. There are two sections in Grant County. The northern section runs from the Wisconsin/Illinois State Line, near Hazel Green, to the Iowa/Grant County Line at Montfort. Then a brief section near Muscoda. WI St Rt 80 passes through the following towns in Grant County. Hazel Green
NB WI St Rt 80 at the Illinois/Wisconsin State Line. SB WI St Rt 80 near the Illinois/Wisconsin State Line. NB WI St Rt 80 in Hazel Green. A junction marker on EB WI St Rt 11. A set of guide markers on EB WI St Rt 11. WB WI St Rt 11/SB WI St Rt 80 north of Hazel Green. WB WI St Rt 11/SB WI St Rt 80 south of east WI St Rt 11. A junction marker on WB WI St Rt 11. SB WI St 80/EB WI St Rt 81 south Platteville. NB WI St Rt 80/SB WI St Rt 133 at GCG G. A guide marker on SB WI St Rt 80/NB WI St Rt 133. NB WI St Rt 80/SB WI St Rt 133 at Front Street in Muscoda. SB WI St Rt 80 near Maple in Muscoda. SB WI St Rt 80 at the Grant/Richland County Line.
