From Missouri State Parks:
Updated March 20th – 2019
Katy Trail State Park is temporarily closed at the following locations due to flooding:
— The trail will be closed due to anticipated flooding at 2:30 p.m. on Fri., Mar. 22 west of the Rocheport tunnel (approximately MM 178.6). Trail users should follow the detour that will be posted. (effective Mar. 22)
— MM 34 – 35, east of St. Charles. (effective Mar. 20)
In addition, Easley River Road/Smith Hatchery Road near MM 162 is under water. While the road is under water, the trail between Route N (MM 162.5) and Little Bonne Femme Creek bridge (MM 163.6) will be opened to local vehicular traffic in this area so users need to exercise caution and expect to encounter vehicles on the trail.