First responders located the man below the center of the bridge, on the river's rocky shore, with injuries to one or both legs. According to initial reports, the man was climbing around in the area and slid down the steep slope.
A rescue team made up of personnel from the Mason County Sheriff's Office and two or more Mason County fire districts responded.
A rescuer was lowered 420 feet from the bridge to the river below and then hauled the man back up.
The bridge, located in the Olympic National Forest about 20 miles north of Shelton, was built in 1929 by the Simpson Logging Co. and is considered the highest bridge in the state.