Missouri Secondary State Route NN runs north, south, east, and west in Northwestern Boone County. It goes from U.S. Rt. 63, near Sturgeon, to Missouri State Route 124, near Harrisburg. MO Sec St Rt NN does not pass through any towns in Boone County. MO Sec St Rt NN is not multi-plexed in Boone County. MO Sec St Rt NN intersects the following highways in Boone County. U.S. Rt. 63, near Sturgeon.
