Missouri State Route 109 is a north-south highway in Western St. Louis County. This runs from Interstate 44/U.S. Rt. 50 to near the Wildwood/Chesterfield City Limits. MO St Rt 109 passes through the folowing towns in St. Louis County. Eureka
Missouri Secondary State Route BA, at Wildwood. Missouri Secondary State Route BA, at Wildwood.
A BGS on WB I-44/U.S. Rt. 50. A BGS on WB I-44/U.S. Rt. 50. A BGS on WB I-44/U.S. Rt. 50. A BGS on EB I-44/U.S. Rt. 50. SB MO St Rt 109 south of MO St Rt 100. A BGS on WB MO St Rt 100.
