Michigan State Route 66 is a north-south highway in Central Kalkaska County. It runs from the Missaukee/Kalkaska County Line, near Pioneer, to the Kalkaska/Antrim County Line, near Westwood. MI St Rt 66 passes through the following towns in Kalkaska County. Kalkaska
Westwood MI St Rt 66 is multi-plexed in Kalkaska County. Michigan State Route 72, near Kalkaska.
U.S. Rt. 131, from Kalkaska to the Kalkaska/Antrim County Line.
MI St Rt 66 intersects the following highways in Kalkaska County. Michigan State Route 72, near Kalkaska.
NB MI St Rt 66 at the Kalkaska/Missaukee County Line. NB MI St Rt 66 south of Lund Road. NB MI St Rt 66 near Sharon Road. NB MI St Rt 66 south of east MI St Rt 72. NB MI St Rt 66 at east MI St Rt 72. NB MI St Rt 66/WB MI St Rt 72 west of east MI St Rt 72. SB MI St Rt 66/EB MI St Rt 72 east of south U.S. Rt. 131. NB MI St Rt 66/WB MI St Rt 72 at south U.S. Rt. 131. SB U.S. Rt. 131/MI St Rt 66; EB MI St Rt 72 at south U.S. Rt. 131. A junction marker on SB U.S. Rt. 131/MI St Rt 66; EB MI St Rt 72. NB U.S. Rt. 131/MI St Rt 66; WB MI St Rt 72 near Sandy Pines Drive. NB U.S. Rt. 131/MI St Rt 66; WB MI St Rt 72 near 3rd Street. A junction marker on EB MI St Rt 72.
