 US 41 enters Houghton along Townsend Drive on the campus of MTU . After crossing the campus , it uses College Avenue into downtown . There , US 41 is split along the one @-@ way pairing of Sheldon Avenue for northbound and Montezuma Avenue for southbound traffic . The two streets merge west of downtown at the south end of the Portage Lake Lift Bridge . Downtown Houghton marks the start of the Copper Country Trail National Scenic Byway . 
