http://www.viamichelin.com/viamichelin/int/dyn/controller/Itineraires?strStartAddress=&strDestAddress=&strStartMerged=algonac,%20mi&strDestMerged=monroe,%20mi &strStartCityCountry=1145799&strDestCityCountry=1145799&empriseW=600&empriseH=310&intItineraryType=1 &caravaneHidden=false&vh=&distance=km&strVehicle=3&devise=1.0|EUR&carbCost=1.3&isAvoidFrontiers=fals e&isFavoriseAutoroute=false&isAvoidPeage=false&isAvoidVignette=false&isAvoidLNR=false&autoConso=6.8& villeConso=6&routeConso=5.6&dtmDeparture=24%2F3%2F2009&indemnite=0

This site gives a slightly different route, taking gratiot south, rather than jefferson/lakeshore. that's gonna be more direct, more travelled, and less scenic. but the michelin site is good to play with routes. just be sure to check "by bike" in the search window!