I ussually ride the North shore Path/Robert Mclory Path from Wauconda (where I live ) to Waukegan
it connects with the Des Plaines River Trail, a descent trail. I haven't riddeen the Fox River Trail but I think we are starting in Mchenry County North of Crystal lake but this summer I may go pretty far on it...We are trying a ride with a fellow commuter (well he did one on BTW day last Friday) hey the more the marrier, as I understand it (although parts under a different name the fox trail goes from wisconsin to Aurora although at the Mchenry County line it has a different name. Hope to eventually see you and I will try and post my plans, still havent done a century but I have some good base miles with my commute going now.