Location: M-66 and US-131, Kalkaska Cty Reassurance shield after the US-131 split. Location: M-66 and M-72, Kalkaska Cty A couple hundred feet later, M-66 will split to continue south. Location: M-66 and M-72, Kalkaska Cty Turn right for M-66 south. Location: M-66 and M-72, Kalkaska Cty Stay on 72 for Grayling. Follow 66 south to … Continue reading Michigan Highway 66, US-131 to MI-72