Wisconsin State Route 78 runs the Wisconsin River. This is about 12 miles long in Western Columbia County. WI St Rt 78 does not pass through any towns in Columbia County. WI St Rt 78 is not multi-plexed in Columbia County. WI St Rt 78 intersects the following highways in Columbia County. Interstate 39, near Portage. Interstate 90, near Portage. Interstate 94, near Portage.
A BGS on NB I-39; WB I-90/94. A BGS on SB I-39. WB WI St Rt 78 near I-39/90/94. The eastern end marker.
