Motorcyclist injured following county line crash. By Rob Alway, Editor-in-Chief. GRANT TOWNSHIP — A 74-year-old Wisconsin man was injured Monday afternoon when the motorcycle he was riding crashed at the intersection of Quarterline and Countyline roads on the Mason-Manistee counties line. That area is currently part of the US 31 construction detour. According to Michigan State Police Trooper Matt Demny,…