The Oregon, Pacific and Eastern Railway is an Oregon-based short line railroad that began near Eugene as the Oregon and Southeastern Railroad (O&SE) in 1904. O&SE's line ran 18 miles (29 km) along the Row River between the towns of Cottage Grove and Disston. The Oregon, Pacific & Eastern Railway Company incorporated in 1912, purchased the physical assets of the O&SE two years later, and shortened their total trackage to operate 16.6 miles (26.7 km) from an interchange yard with the Southern Pacific Railroad at Cottage Grove, east to a 528' x 156' turnaround loop at Culp Creek. The last of this track was closed and scrapped in 1994, and ownership of its abandoned right of way property was later reverted to the state of Oregon to become one of the first-ever Government/Private Sector cooperative partnership Rails to Trails programs in the US, forming the Row River National Recreation Trail. A successor corporation now operates a communications company and a narrow-gauge line at Wildlife Safari.

Walden is an unincorporated community in Lane County, Oregon, United States. It is about 3 miles (5 km) southeast of Cottage Grove, near the confluence of the Row River and Mosby Creek.