Trail 2 east to iron Mountain then 5 north to big bay is a nice ride. could also take trail 5 north to trail 8 east through Ishpeming to south end of Marquette. trail 8 turns south to Gwinn. This stretch of trail 8 is one of my favorites. Once in Gwinn you can stop at the UP North Lodge. It's on the trail. Nice place to eat and rest. from there you can take 33 west to 32 then continue west back to trail 5 then down to trail 2 in Iron Mountain. 2 west to Iron river/crystal falls. Highly recommend that loop if you are looking for something new. If you decide to do this loop, make sure you gas up in Gwinn. Nothing between Gwinn and Iron Mountain.
there are other options as well...