Rainbow Bridge, Steel cantilever bridge in Port Arthur, Texas

Rainbow Bridge is a steel cantilever truss bridge over the Neches River, carrying State Highways 87 and 73 between Port Arthur and Bridge City. Its main span measures 680 feet (210 m) and its vertical clearance is 177 feet (54 m). The photograph shows the gray steel truss rising above the dark asphalt deck as an open triangular arch, with a pale concrete median barrier and a small white sign reading "ELEV 60" near the base.

Construction of the Rainbow Bridge began in 1936 under the Texas State Highway Department. Beaumont's concern that the span would obstruct shipping led to a 680-foot main span and a 177-foot vertical clearance, meant to let the USS Patoka pass; the ship never did. The bridge opened on September 8, 1938, was renamed in 1957, and was listed on the National Register of Historic Places in 1996.

The bridge was first named the Port Arthur-Orange Bridge and took its current name in 1957. The nearby town of Prairie View renamed itself Bridge City after the span opened in 1938. Since 1997 the Rainbow Bridge carries only westbound traffic, with eastbound vehicles using the parallel Veterans Memorial Bridge.

Since reopening in 1997 the Rainbow Bridge carries only westbound traffic on US 87/73; eastbound vehicles use the parallel Veterans Memorial Bridge. A 2014–2017 refurbishment replaced the pavement, repainted the steelwork and repaired the supports. Near the southwest base a small white sign marks the elevation as 60.

The 177-foot clearance was designed so the USS Patoka, then the tallest ship in the U.S. Navy, could pass beneath, but the ship never did. The same height later let the Bethlehem Beaumont Shipyard build 72 jack-up offshore drilling rigs, which were towed downriver under the span.