OKay Kiddies... here's the rundown from Imlay City and ON...
The around the Thumb Ride will consist of some "twisties", scenic area, and open back roads with lil to no traffic....
Meet ya in Imlay City 10 AM leave no later than 10:15 AM YUP that's right you got 15 minutes to go potty and fill your tanks
Obvisouly if the whole gang does not show up till after 10:15 due to an uncontrollable circumstance I ain't gonna take off alone LOL.. but 15 minutes after Headlight and the gang shows up we will at that point be pulling off
So if you are meeting me in Imlay City separate from Headlight better be there on time just in case they are
meeting place in Imlay City: BP Gas Station (On the EAST Side of M53 just North of the Overpass for I69)
Route: I69 East to M19 North to M136 East to M25 West around the Thumb - Stopping in Forestville for gas - continue on M25 to Grindstone for Late Lunch at Captain Morgans around 1:00 or 1:30 - continue on M25 through Caseville to some back roads through Sebewaing stopping for gas - depending on time of day either take route south towards M24 for you to return through Lapeer or take route east towards M53 for you to return through Imlay City.
Ride Time from Imlay City to Sebewaing area: 5 hrs to include an hour to eat
If return route is from Sebewaing to Imlay City: 1.5 hrs
If return route is from Sebewaing to Lapeer to Imlay City: 2.5 hrs
So you are looking at being back in Imlay City if all times go according to schedule around 5 or 6 pm
If there are people who can not make an ALL day of it you can cut off the route early from Port Austin and take M53 south down through Bad Axe and continue on to Imlay City which would put you returning around 4:00 pm? (this includes the 1 hr lunchtime)
I'll post up a map shortly...