Castle Rock is an

island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island ...

Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

. It is one of the

Shumagin Islands The Shumagin Islands (Unangan: ''Qagiiĝun''; russian: Острова Шумагина) are a group of 20 islands in the Aleutians East Borough south of the mainland of Alaska, United States, at 54°54'–55°20' North 159°15'–160°45' West. ...

. Castle Rock is in Aleutians East

Borough A borough is an administrative division in various English-speaking countries. In principle, the term ''borough'' designates a self-governing walled town, although in practice, official use of the term varies widely. History In the Middle A ...

, and is located off the south coast of the Alaska Peninsula at 55.27917° North

Latitude In geography, latitude is a coordinate that specifies the north– south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from –90° at the south pole to 90° at the north pol ...

159.49944° West

Longitude Longitude (, ) is a geographic coordinate that specifies the east– west position of a point on the surface of the Earth, or another celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek lette ...

. A ''Barnegat''-class seaplane tender, the USS ''Castle Rock'' (AVP-35), was named for the island.

References

Citations External Links
Trails.com Castle Rock USGS Stepovak Bay Quad, Alaska, Topographic Map
Shumagin Islands Islands of Alaska Islands of Aleutians East Borough, Alaska {{AleutiansEastAK-geo-stub