Links to consider..
https://www.lmb.org/ride-calendar/shoreline-west-2019/
https://www.lmb.org/bike-mi/michigan-bike-routes-maps/
You can download these maps of all areas..shows roads and traffic volume(I picked up one of these recently..nice maps)
https://www.michigan.gov/mdot/0,4616...6053--,00.html
The Michigander Tour happens every year too..on many of the northern trails
https://www.bikesignup.com/Race/Even...r#event-181141