Ran the 'Thumb' yesterday. It was sort of an impromptu drive.
My wife and I have driven it before, in early summer and really liked it.
It was beautiful yesterday w/the leaves changing colors.
We need to get a bunch of people together and do this next Spring.

We went Route 25 from Bay City up through Bad Axe, then you can come down at Frankenmuth/Birch Run (I'm sure there are many other ways to go).