Missouri Secondary State Route NN is a north-south highway in Northeastern Madison County. This runs through the Mark Twain National Forest. It runs north from Missouri Secondary State Route J into the forest. MO Sec St Rt NN does not pass through any towns in Madison County. MO Sec St Rt NN is not multi-plexed in Madison County. MO Sec St Rt NN intersects the following highway in Madison County. Missouri Secondary State Route J, near Junction City.
