M-15 is a north-south highway that starts in the south in Oakland County, near Clarkston.  It then passes through the counties of Genesee, Tuscola, Saginaw and finally ends in Bay County.  It is considered a "recreational trail" and there has been talk for years of building one continuous walking/biking trail from one end to the other.  We can only hope,  (What a fun power trail that would be!)

The cache IS at the posted coordinates.  Easy parking nearby.

This is a challenge cache where you must find 15 caches in all of the counties that M-15 pass through (Oakland, Genesee, Tuscola, Saginaw, Bay) before claiming a find.