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Twin Rocks State Natural Site

United States, Oregon

Twin Rocks State Natural Site

LocationUnited States, Oregon
RegionOregon
TypeState Natural Site
Coordinates45.5036°, -123.9497°
Established1970
Area28
Nearest CityRockaway Beach (8 mi)
Major CityHillsboro (46 mi)

About Twin Rocks State Natural Site

Twin Rocks State Natural Site protects the scenic twin sea stacks visible from Rockaway Beach on Oregon's north coast. The rocks are iconic landmarks of this stretch of coastline, providing habitat for seabirds and marine mammals. The site preserves these natural monuments for public enjoyment and wildlife protection.

Wildlife Ecosystems

The sea stacks provide nesting habitat for seabirds including cormorants, common murres, and gulls. Harbor seals and sea lions haul out on the rocks. The offshore waters support diverse marine life. The rocks are important for wildlife in this developed coastal area.

Flora Ecosystems

The rocky sea stacks support little vegetation due to wave exposure and seabird activity. The adjacent shoreline features beach grass and coastal shrubs. The nearby forests include Sitka spruce and shore pine. The site's value is primarily geological and wildlife-oriented.

Geology

Twin Rocks are sea stacks composed of resistant basalt that has survived while surrounding softer rocks eroded. The rocks demonstrate ongoing coastal erosion processes. Wave action continues to sculpt these landmarks. The basalt formed from ancient volcanic activity.

Climate And Weather

The site experiences the mild, wet climate of the north Oregon coast. Summers are cool with temperatures in the 60s°F. Winters are mild and wet. The rocks are constantly battered by waves and wind. Storm watching reveals dramatic wave action.

Human History

The Tillamook people knew these rocks for thousands of years. The distinctive landmarks served as navigation aids for early mariners. Rockaway Beach developed as a resort community with the rocks as a scenic backdrop. The rocks remain beloved local landmarks.

Park History

Twin Rocks became a State Natural Site to protect the sea stacks and their wildlife values. Oregon State Parks manages the site for conservation. The rocks are protected from disturbance while remaining visible from shore.

Major Trails And Attractions

The twin sea stacks are best viewed from Rockaway Beach. The rocks provide dramatic scenery and photography opportunities. Wildlife observation includes seabirds and marine mammals. The rocks are iconic symbols of this stretch of coast.

Visitor Facilities And Travel

This natural site has no developed facilities—viewing is from adjacent beaches. The rocks are located offshore from Rockaway Beach, accessible from Highway 101. The town provides services. The rocks are visible year-round.

Conservation And Sustainability

The natural site designation protects the sea stacks and their wildlife from disturbance. The rocks are managed as seabird habitat. Public viewing is from a distance to prevent disturbance. The site demonstrates protection of natural monuments.