As indy said, there is an ungroomed path between the bridge and Michigan Tech. It will be bumpy and a few road/parking lot crossings, but overall its pretty easy to follow. I've used it plenty of times over the years leaving from Tech (when crossing the ice across to trail 3 was unsafe) and its never been absolutely horrible in terms of bumps or lack of snowcover (remember, it is through the city, so take it slow regardless). Once you get past the Super 8, you will come to the MTU motor pool and other academic/research buildings on the canal. Either take the road up to the top of the hill and park there on the west side of campus (more centrally located for statues), or continue along the canal following the snowmobile tracks, then a sharp right up a steep hill to the snowmobile/vehicle parking lots on the east side of campus.