Chicago to South Manitou Island
I don't sail a Tartan 10 but have done the Mac, which generally results in a route through the Manitou Passage. We generally start the race mid-day Saturday and, during the past few races, have arrived at the Manitous late Sunday afternoon or early Sunday evening. We rate faster than a Tartan 10 but I would guess they wouldn't be more than an hour or so behind us. Of course, your results will vary with wind speed, direction, waves, etc.