Blind Slough Swamp Preserve on the Oregon Coast.
Blind Slough Swamp Preserve Blind Slough Swamp Preserve on the Oregon Coast. © Tammi Lesh

Places We Protect


Blind Slough Swamp Preserve

Ancient Sitka spruce trees provide habitat for bald eagle, osprey, salmon, river otter and beaver.

Why You Should Visit   

Well-known for birding, canoeing and kayaking, Blind Slough Swamp is the best example of a Sitka spruce swamp remaining in Oregon. Once common in coastal estuaries from Tillamook to Alaska, this habitat type has been mostly lost in Oregon and Washington to logging, diking and other development. The preserve is bordered on three sides by Columbia River sloughs and channels, and is adjacent to the Lewis and Clark National Wildlife Refuge.


Lower Columbia River, east of Astoria, in Northwest Oregon


897 acres

What the Conservancy Has Done/Is Doing

Each spring and summer, teams of volunteers remove invasive blackberry, English ivy and purple loosestrife to protect the preserve's native habitats and the wildlife they support. 

What to See: Plants

The preserve's overstory is dominated by Sitka spruce trees — some 400 years old — with younger western red cedar and western hemlock also present. Dense thickets of coast willow, Sitka willow, twinberry and nootka rose line the channels, as well as abundant sedges, wildflowers and bulrushes.

What to See: Animals

The preserve provides habitat for an abundance of birds, fish and other wildlife, including bald eagles, osprey, river otter, beaver, coho salmon, nesting yellow warblers, olive-sided flycatchers and rufous hummingbirds.

Plan Your Visit:

May, June and September are the best times to visit. During February/March and July/August, the preserve is closed to visitors without permission due to the presence of nesting and fledging bald eagles. There is no trail into the preserve. Hunting, camping and campfires are not allowed.