Mosby Creek Bridge, Covered bridge near Cottage Grove, Oregon.

The Mosby Creek Bridge, also known as the Layng Bridge, is a Howe truss covered bridge near Cottage Grove, Oregon. It crosses Mosby Creek on a timber truss modified with semi-circular portal arches, ribbon openings at the roofline and board-and-batten siding. Built in 1920, it is the oldest covered bridge in Lane County and still carries traffic.

Built in 1920 by Walter and Miller Sorensen, the structure became the oldest covered bridge in Lane County. Its construction marked an important phase in local infrastructure development.

The bridge takes its name from pioneer David Mosby, who claimed 1,600 acres (650 ha) east of present-day Cottage Grove near the crossing site. Locals also call it the Layng Bridge, and it is the only bridge in the area still carrying traffic.

The bridge is the only one in the area still open to traffic, so drivers can cross it directly; the county carries out regular maintenance. Visitors can also park nearby and photograph the portals and roofline from outside the deck.

The corrugated metal roof added over the gable was replaced with synthetic material in 2002, not during the 1990 restoration. The bridge is also known as the Layng Bridge, and it is the only covered bridge in its area still open to traffic.