Missouri Route 109
MO 109 highlighted in red | ||||
| Route information | ||||
| Maintained by MoDOT | ||||
| Length | 13.128 mi (21.127 km) | |||
| Major junctions | ||||
| South end | Route W / Route FF in Jefferson County | |||
| I-44 / US 50 in Eureka Route 100 in Wildwood | ||||
| North end | Route CC (Wild Horse Creek Road) in Chesterfield | |||
| Location | ||||
| Country | United States | |||
| State | Missouri | |||
| Counties | Jefferson, St. Louis County | |||
| Highway system | ||||
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Route 109 is a state highway in St. Louis County, Missouri and Jefferson County, Missouri. Its northern terminus is at Wild Horse Creek Road in Chesterfield; its southern terminus is at Routes W and FF in Jefferson County. The road continues north, curves around Spirit of St. Louis Airport and connects with Chesterfield Airport Road, providing a "backway" to the Chesterfield area.