Missouri Secondary State Route YY is a short east-west highway in Northern Pike County. It runs west of Missouri State Route 79, northwest of Louisiana. MO Sec St Rt YY does not pass through any towns in Pike County. MO Sec St Rt YY is not multi-plexed in Pike County. MO Sec St Rt YY intersects the following highways in Pike County. Missouri State Route 79, near Louisiana.
Missouri Secondary State Route AD, near Louisiana.
