Missouri Secondary State Route O is a north-south highway in Western Boone County. This runs near the Missouri River from Interstate 70/Missouri Secondary State Route J to Huntsdale. MO Sec St Rt O passes through the following town in Boone County. Huntsdale MO Sec St Rt O is not multi-plexed in Boone County. MO Sec St Rt O intersects the following highways in Boone County. Interstate 70, near Midway. Missouri Secondary State Route J, near Midway. Missouri Secondary State Route UU, near Huntsdale.
