The cache is not at the posted coordinates. You must solve the puzzle.
Caches are along the Fred Meijer Flat River Valley Rail Trail between Belding and Lowell. Parking is in Lowell and Belding. Waypoints for those are in listed in 01 Lowell Showboat. Other than those two locations, you may be able to get away with parking on the side of the gravel roads, but no guarantees. The Fred Meijer Flat River Valley Rail Trail is 22 miles and connects Lowell to Greenville. The trail surface is coarse railroad ballast with paved segments in Belding and Smyrna. In Greenville it connects to the Fred Meijer Heartland Trail and in Lowell it connects to the Fred Meijer Grand River Valley Trail.