Cycling Routes: Route around Lake Michigan?

Does anybody know a resource to figure out a route to ride around Lake Michigan?  I did not see any route on the web site.  If anyone has done it or knows someone who has riden around the lake, infor mation would be greatly appreciated.  Trying to get as many sources as possible.  A group of firefighters that normally raise money for widows and families of Fallen Firefighters, called 'Ignite the Spirit', http://ignitethespirit.org/, are now trying to raise money for Cancer Research.  I am not sure it I am going to do the ride but said I would help out with planning and some training.  They plan on going through Indiana and Michigan first, then down through Wisconsin.  Thanks for any assistance.