M-93 is actually two spur routes connected by a pair of multiplexes. M-93 starts at Camp Grayling, heads northeast to M-72, then multiplexes with M-72 into the city of Grayling. At the junction with BL I-75, M-93 multiplexes with BL I-75 north to I-75, where M-93 continues solo to a northern terminus at the former main entrance to Hartwick Pines State Park.
The following photos of both of the endpoints of M-93 are courtesy of Brian Reynolds, as taken on May 11, 2002.
Below is an overview of the entrance to Camp Grayling of the Michigan National Guard, where southbound M-93 ends. This location is 2 miles southwest of M-72.
Here is a closer shot of the southern terminus signage. Note the use of a directional tab atop the M-93 ENDS assembly.
Below is the northern terminus of M-93 at Hartwick Pines State Park, at the former main entrance. About a decade ago, in a renovation of the park, the entrance was moved a mile southwest of this point, but state maintenance continues to this point today. This location is 3 miles northeast of I-75 @ exit #259.
Here is a closer shot of the northern endpoint signage. Again, note the use of a directional tab above the M-93 ENDS assembly.