Postagoni River Bridge

Postagoni River Bridge is a historic railway bridge located south of Macdiarmid in northwestern Ontario. Set along the former Canadian Northern Railway / Canadian National Kinghorn Subdivision, the bridge crosses the Postagoni River in a rugged forested area near Lake Nipigon. It is an interesting stop for railway history enthusiasts, photographers, hikers, and visitors exploring the lesser-known heritage sites along Highway 11. The bridge is part of the region’s early 20th-century railway history. Built in 1924, it replaced an earlier wooden trestle and became an important structure on the rail line that once connected remote northern communities, logging areas, and transportation routes. The bridge measures about 287 feet long and stands roughly 55 feet above the river, giving it a striking presence in the surrounding landscape. The area around Postagoni River Bridge feels quiet, remote, and atmospheric. The abandoned rail corridor, forest, river, and weathered industrial structure create a strong sense of northern Ontario’s transportation past. It is not a developed tourist attraction, so visitors should expect rough access, natural conditions, and no formal facilities. Sturdy footwear, caution, and respect for private property or posted restrictions are important. Postagoni River Bridge reflects the engineering effort and railway expansion that helped shape northwestern Ontario. Whether someone is interested in abandoned rail lines, northern history, photography, or off-the-beaten-path exploration, the bridge offers a memorable glimpse into the region’s past and the rugged landscape that made railway construction such a major undertaking.