Based off route for the now defunct Michigan Mountain Mayhem Gravel Grinder. Start point is the Tanton Mountain Bike trails. No services on route. You can add distance to go into Boyne City or Boyne Falls if desired.

Gravel roads, two-track, hunting trails through the Allegan State Game Lands. Wide tires are recommended as there is deep sand in some cases.
Start point is Little John Lake County Park, which has facilities. Route has not been ridden after mile 25 (route creator cut back to the start from this point when he rode it) but is on all marked roads.