At the end of the Aufderheide National Scenic Byway, folks can find the Office Bridge, also called the Westfir Covered Bridge, crossing the North Fork Middle Fork Willamette River. It measures 180 feet in length, making it the longest covered bridge in the state of Oregon. Its length also made it one of the only two bridges in the state to use tripe Howe truss engineering.

Built in 1944, the Office Bridge was a replacement to an earlier bridge that got washed away. It was initially used by the Westfir Lumber Company to haul logging and lumber trucks, which are being carried to the mill pond and lumber mill owned by the company.

The Office Bridge is now a part of a public park, which is also the trailhead to the North Fork Trail.