The Discovery Bridge is a pair of truss bridges carrying Missouri Route 370 across the Missouri River between St. Louis County and St. Charles County, in the U.S. state of Missouri. A barrier-separated bicycle and pedestrian path along the northeast side of the bridge opened in 2020. Separate bicycle/pedestrian access ramps are available immediately on both ends of the bridge. This provides a connection to and from the Katy Trail, which passes under the bridge.