I knew this marker was coming up as we drove south on 141 south of Coleman. But, come to think of it, there was no brown warning sign that a marker was just ahead, so when I saw the building and realized we were upon it, I may have squealed the tires a bit so we could stop in time to make the turn (from the left lane).
The marker and schoolhouse are now privately owned. I guess this partly explains why there’s not really a drive-off or parking lot in the area.
