Deer Island: River Floodplains, Wildlife, and History

Deer Island brings together the Columbia River landscape, remarkable wildlife, and a history that goes back to the early days of the salmon trade. A large side channel cuts across the island; Deer Island Slough is a six-mile-long side channel separated from the main river. Nature and history thus give you two different points of reference when searching for a vacation rental: the river and wetland landscape, and the area's past.

River Floodplains and Side Channels

A 2009 survey estimated the area of Deer Island within the Columbia River floodplain at more than 1,821 hectares. Historically, this floodplain included backwater and side-channel habitats influenced by the tides, including Deer Island Slough. An older recreation guide gives the slough's area as 68 acres; it lies northwest of Columbia City along Highway 30. The different figures describe different aspects of the landscape: the extensive floodplain and the individual side channel.

Wetlands and adjacent agricultural lands in the Deer Island area also provide important habitat for waterfowl on the Lower Columbia River. An account published in 2016 reports that Deer Island can host 10,000 ducks at times during fall migration. A 2009 survey also caught Chinook and Coho salmon in the southern Deer Island Slough. The historical date pertains to this survey finding.

Wildlife Habitat

The Deer Island Conservation Opportunity Area provides habitat for Columbian white-tailed deer, migratory birds, and Coho salmon. It includes some of the few populations of the federally threatened Columbian white-tailed deer (Odocoileus virginianus leucurus) in Oregon. The islands associated with this area on the Lower Columbia River provide important habitat for migrating and wintering shorebirds and waterfowl.

Deer Island Slough is home to the largest turtle population in Columbia County. Local surveys reported in 2026 recorded six native reptile species and four native amphibian species there. A report published in 2026 cites about 60 bird species in surveys at the slough, including White-breasted Nuthatches, Purple Martins, nesting Bald Eagles, and Great Egrets. The figure remains approximate; the species mentioned give an idea of the variety of documented observations.

At the northern end of the slough lies the 550-acre Columbia Stock Ranch. Columbia Land Trust acquired the property in 2012. Between 2020 and 2022, the trust arranged the relocation of 37 Columbian white-tailed deer there. The ranch and the relocation are specific milestones in the region's conservation history.

History on the River

A 2026 local article reports that Indigenous people named Deer Island centuries ago. Deer Island's founding is dated to 1843. Another historical account goes back to 1829, when Captain John Dominis bought salmon from Indigenous people near Deer Island. He later became the first person to export preserved Pacific salmon to the East Coast. The salmon from the area was salted in 53 empty rum barrels and taken to Boston for sale.

This episode brings the river to life not only as a habitat, but also as part of the history of trade. If you are traveling together, the combination of landscape, wildlife, and salmon history can accommodate different interests in your planning—from the floodplain landscape to a specific historical event.

Deer Island as a Base for Your Stay

Columbia River PUD has an electric vehicle charging station on Deer Island, with a scenic walking path running through the station area. If you are arriving by electric car, the charging station is a practical point to include in your plans. Check the current information before setting out. The walking path adds an opportunity to explore the surroundings near the station to the practical details.

When choosing a vacation rental, you can consider which aspect of the destination matters most for your stay: wetlands and wildlife, the historic salmon trade, or a walk near the charging station. This makes it possible to appreciate Deer Island through its landscape and documented local history, without relying on nature-related interests alone to decide which accommodation is right for you.

Discover more destinations: Clatskanie, St. Helens

For the main travel overview: Columbia County.