Thanks for the map- I know this one by heart. It's easy to do by trail, but more difficult to do when you keep north and roll through Skokie and Evanston into Wilmette, then cut across on Green Bay Road to try and pick up the trail.
I got it figured out- next time, I will stick with Green Bay Road from McCormick Road and take Green Bay all the way to Sheridan, then take Sheridan for a bit until I catch the trail again and catch the last 10 miles or so up to North Chicago. If I do it this way, it makes life a lot easier for me. A lot of street riding, for sure, but I'm ok with that!
Koffee