High Steel Bridge is a truss arch bridge that spans the south fork of the Skokomish River in Mason County, Washington. It was built in 1929 by Simpson Logging Company as part of a logging railroad. Its construction opened up an area of Olympic Peninsula timber that was previously inaccessible. The bridge span supported a single logging railroad track. In 1950, the tracks were replaced with wooden planks, allowing vehicles to pass. 1964 brought the relatively modern addition of concrete decking and guardrails.