Michigan Mountain Mayhem Gravel Grinder - Boyne City, Michigan (2019-09-28)
From the Promoter: The MMM Gravel Grinder is a gravel road race like nothing you can imagine. This event is limited to 2000 riders. Expect lots of fast gravel mixed with some tough climbs, multiple sections of tough seasonal roads which have sand, mud and rocks and also a white-knuckle descent. Wh