The 1945 Office Bridge, also called Westfir Covered Bridge, is a covered bridge in Westfir, Lane County, Oregon, crossing the North Fork of the Middle Fork of the Willamette River at the south end of the Aufderheide National Scenic Byway and the edge of the Willamette National Forest. It is Oregon's longest covered bridge at 180 ft (55 m) and is one of only two in the state using triple Howe truss construction, and is the only covered bridge west of the Mississippi River that has a separate pedestrian walkway that allows pedestrians to safely cross the bridge without being in the way of loaded logging trucks.

This bridge is a replacement for a 1941 bridge that washed away. It was built in 1944 by the Westfir Lumber Company to carry logging trucks and lumber trucks to the company's lumber mill and mill pond. The company headquarters and offices were located across the river, in what is now a bed and breakfast, which retains the company's original walk-in safe.

The company-owned town of Westfir, the mill, and the bridge were sold to an investment firm in 1977. The lumber mill burned to the ground in 1979, but spared the bridge and the main office. In 1992, the bridge ownership changed to Lane County due to property tax foreclosure. Extensive structural work in 1993 stabilized the bridge, and in 2002, the roof was replaced.

Formerly, the bridge was closed to public access, but around 2003, a small park was established on the north side of the bridge. The park also serves as a trailhead to North Fork Trail #3666, which follows the Wild and Scenic section of the North Fork River, which ends a few hundred feet upriver from the bridge.

Each Christmas season, the town decorates the bridge with lights, and a firetruck driven by Santa Claus turns the lights on the first week after Thanksgiving.

Located at:  N43 45.508   W122 29.745      -      WGCB #37-20-39

Photographed in May of 2025

Photos by Millard Farmer