For the most part one would want to take a car, especially in winter when snow or ice covers everything. In the summer one could rent bicycles from one of the local bike shops, notably Lakeshore Bikes (http://www.bikemag.com/fe...), which is fittingly located on Lakeshore Drive which fittingly runs alongside Lake Superior. Marquette has several bike paths (http://www.mqtcty.org/dep...), one of which runs alongside the lake from Presque Isle Park (http://www.mqtcty.org/dep...) to the intersection of M-28 and US-41. Biking on M-28 or the backroads around town is rather pleasant and the traffic isn't too harsh.
There is also county-wide bus service (http://www.marq-tran.com/), which runs a few fixed routes and also offers door to door service.
