Missouri Secondary State Route B is a north-south highway in Eastern Lewis County. This runs from U.S. Rt. 61/BUSN U.S. Rt. 61, southwest of La Grange to U.S. Rt. 61/BUSN U.S. Rt. 61, north of Canton. MO Sec St Rt B passes through the following towns in Lewis County. La Grange
Canton MO Sec St Rt B is multi-plexed in Lewis County. BUSN U.S. Rt. 61, near La Grange.