Missouri Secondary State Route H is a east-west highway in Central Boone County. This runs from U.S. Rt. 63 to the Columbia Regional Airport. MO Sec St Rt H does not pass through any towns in Boone County. MO Sec St Rt H is not multi-plexed in Boone County. MO Sec St Rt H intersects the following highway in Boone County. U.S. Rt. 63, near Columbia.