S Main St at Boones Lick Road
St. Charles Trailhead is located on the Katy Trail, in St Charles MO
Directions: I-70 to Fifth Street exit North. Veer right on Boonslick Rd (first major intersection after McDonalds). Follow this street and continue straight after the stop sign at Main Street. Immediately after crossing Main Street, when the street curves and turns into Riverside, stay to the right and turn into the parking lots.