Save This Event For Later Michigan Mountain Mayhem "Spring Classic" Boyne City, MI, Sat Jun 16, 2018 Contact Event | Event Website | Google Calendar Start line address: 1035 Boyne Ave, Boyne City, MI 49712 Presented by Northern Michigan Cycling Club This is a past event. If you wish to see the details for this event click, "Continue" below. If you are looking for a current event, please search the event calendar .