Missouri State Route 100 is a east-west highway in Central Washington County. It runs from the Franklin/St. Louis County Line to the St. Louis City Limits. MO St Rt 100 passes through the following towns in St. Louis County. Wildwood
Ellisville
Ballwin
Manchester
Des Peres
Kirkwood
Glendale Warson Woods Rock Hill
Brentwood Maplewood MO St Rt 100 is not multi-plexed in St. Louis County. MO St Rt 100 intersects the following highways in St. Louis County. Missouri Secondary State Route T, at Wildwood.
EB MO St Rt 100 at MO Sec St Rt T. A BGS on SB MO St Rt 109. WB MO St Rt 100 east of MO St Rt 109. WB MO St Rt 100 east of Ellisville Town Center Dr. WB MO St Rt 100 east of Old State Road. EB MO St Rt 100 west of MO St Rt 340. EB MO St Rt 100 at New Ballwin Road. A BGS on NB MO St Rt 141. A BGS on NB MO St Rt 141. EB MO St Rt 100 at MO St Rt 141. EB MO St Rt 100 at Highlands Blvd. A BGS on NB I-270. A BGS on NB I-270. A BGS on SB I-270. EB MO St Rt 100 east of I-270. EB MO St Rt 100 in Kirkwood. EB MO St Rt 100 east of Rock Hill Road. EB MO St Rt 100 east of Brentwood Blvd.
