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Three Arch Rocks

Large rocks off the northern Oregon coast which serve as important seabird breeding colonies, Three Arch Rocks was the first designated National Wildlife Refuge west of the Mississippi River.

Red Marker Three Arch Rocks
Large rocks off the northern Oregon coast which serve as important seabird breeding colonies, Three Arch Rocks was the first designated National Wildlife Refuge west of the Mississippi River.

Location: On the northern Oregon coast about 2 miles south of Cape Meares and 1 mile west of Oceanside, Tillamook County.

Description: This site includes three large rocks and six small rocks totalling 15 acres. The four largest rocks serve as seabird breeding colonies, including Finley Rock, Middle Rock, Shag Rock, and Seal Rock. Shag Rock contains low vegetation on the north slope and Finley Rock contains vegetation on the north and east slopes and is the tallest rock at over 300 feet above sea level.

Ornithological Highlights: Twelve species of seabirds breed here totaling approximately 200,000 birds. This includes the largest breeding colony of Common Murre south of Alaska and Oregon's largest breeding colony of Tufted Puffin. Other seabird species breeding on this refuge include Leach's Storm-petrel, Brandt's Cormorant and Pigeon Guillemot. Over 800 Brown Pelicans have been seen here roosting and up to 13 Bald Eagles have been observed preying on seabirds.

For more information on Three Arch Rocks, please see the Technical Site Report in the National IBA database.

Links:

45.464 -123.9879

Location: On the northern Oregon coast about 2 miles south of Cape Meares and 1 mile west of Oceanside, Tillamook County.

Description: This site includes three large rocks and six small rocks totalling 15 acres. The four largest rocks serve as seabird breeding colonies, including Finley Rock, Middle Rock, Shag Rock, and Seal Rock. Shag Rock contains low vegetation on the north slope and Finley Rock contains vegetation on the north and east slopes and is the tallest rock at over 300 feet above sea level.

Ornithological Highlights: Twelve species of seabirds breed here totaling approximately 200,000 birds. This includes the largest breeding colony of Common Murre south of Alaska and Oregon's largest breeding colony of Tufted Puffin. Other seabird species breeding on this refuge include Leach's Storm-petrel, Brandt's Cormorant and Pigeon Guillemot. Over 800 Brown Pelicans have been seen here roosting and up to 13 Bald Eagles have been observed preying on seabirds.

For more information on Three Arch Rocks, please see the Technical Site Report in the National IBA database.

Links:

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