Twin Rocks

Twin Rocks State Natural Site is a coastal natural area on the northern Oregon coast in Tillamook County, named for the pair of distinctive sea stacks that stand just offshore near the community of Twin Rocks between Rockaway Beach and Barview. The site protects the coastal viewpoint and access area from which these iconic rock formations can be observed. The twin sea stacks are among the most recognizable landmarks on the northern Oregon coast.

The offshore Twin Rocks provide important nesting and roosting habitat for seabirds as part of the Oregon Islands National Wildlife Refuge. Common murres, Brandt's cormorants, and pelagic cormorants use the rocks. The surrounding waters support harbor seals and gray whales. The beach area attracts shorebirds during migration. Black oystercatchers forage on the rocky intertidal areas near the base of the sea stacks during low tides. Bald eagles patrol the coastline.

The coastal vegetation at Twin Rocks includes salt-tolerant plants on the bluff edges, transitioning to coastal forest dominated by Sitka spruce and shore pine. The windswept bluff-top supports salal, wax myrtle, and hardy coastal grasses. Seaside daisy and other wildflowers bloom in spring. The sea stacks themselves support only the hardiest algae, lichens, and a few salt-tolerant plant species that can survive the constant wave splash and wind exposure.

The Twin Rocks are erosional remnants of more resistant basalt formations that have withstood millions of years of wave action while the surrounding softer rock was worn away. The basalt is part of the Columbia River Basalt Group, massive flood basalt flows that traveled from eastern Oregon to the coast approximately 15 million years ago. The columnar jointing characteristic of these basalt flows is visible in the sea stacks. The ongoing erosion will eventually claim these formations, though the process occurs over geological time scales.

Twin Rocks shares the cool, wet climate of the northern Oregon coast. Summers are mild with frequent fog, and winters bring powerful storms and heavy rainfall. Annual precipitation exceeds 85 inches. The exposed coastal position means the area experiences strong winds, particularly during winter storms when waves can send spray high up the sea stacks. The best viewing conditions typically occur during clear periods between weather systems.

The Tillamook people knew these distinctive rock formations and incorporated them into their cultural landscape. The sea stacks served as navigation landmarks along the coast. Euro-American settlers named the community of Twin Rocks after the formations. The coastal area developed as a modest beach community in the early 20th century, maintaining a quiet residential character while the rocks became one of the most photographed landmarks on the north coast.

Twin Rocks State Natural Site was designated to protect the viewpoint and coastal access area associated with the Twin Rocks sea stacks. The sea stacks themselves are protected as part of the Oregon Islands National Wildlife Refuge, which encompasses over 1,800 rocks, reefs, and islands along the Oregon coast. The natural site designation ensures that the land-based viewing area remains accessible to the public.

The sea stacks are the primary attraction, visible from the beach and bluff-top viewpoints. Photography opportunities are exceptional, particularly at sunrise and sunset when the rocks are silhouetted against the sky. The beach offers walking and beachcombing. Nearby Tillamook Bay provides crabbing and fishing opportunities. The Three Capes Scenic Route, which passes through the area, offers some of the most dramatic coastal scenery in Oregon.

Twin Rocks State Natural Site is located along U.S. Route 101 in the community of Twin Rocks, between Rockaway Beach and Barview. Parking and basic beach access are provided. The surrounding community offers vacation rentals and basic services. More extensive visitor amenities are available in Tillamook to the south and Rockaway Beach to the north.

The sea stacks are protected under the Oregon Islands National Wildlife Refuge, which prohibits public access to the rocks to protect nesting seabirds. The land-based natural site is managed to prevent erosion and maintain native vegetation on the coastal bluffs. The sea stacks face no immediate human threats but will eventually be claimed by erosion over geological time. Climate change effects including sea level rise and increased storm intensity may accelerate erosion of both the sea stacks and the adjacent shoreline.