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Archipelago

    Pacific OceanUnited States

    55°10′N 131°35′W

    Gravina Islands

    Part of Alexander Archipelago

    The Gravina Islands are a group of islands that are a part of the Alexander Archipelago in southeast Alaska. The islands are bounded by the Clarence Strait on the west and the Revillagigedo Channel on the east.

    The north shore of Gravina Island near Ketchikan, Alaska, United States, as seen from a ferry boat traveling up the Inside Passage
    The north shore of Gravina Island near Ketchikan, Alaska, United States, as seen from a ferry boat traveling up the Inside Passage

    Jsayre64 / CC BY-SA 3.0

    Chart

    151 landforms

    Overview

    The Gravina Islands are a group of islands that are a part of the Alexander Archipelago in southeast Alaska. The islands are bounded by the Clarence Strait on the west and the Revillagigedo Channel on the east. The largest islands in the group are Gravina Island, Annette Island, Duke Island, and Mary Island. The Spanish explorer Jacinto Caamaño named the Gravina Islands group in 1792, in honor of Federico Carlos Gravina y Nápoli.

    From Wikipedia, CC BY-SA 4.0

    Census, cataloged

    • Major islands3
    • Minor islands5
    • Islets67
    • Rocks & skerries76

    Major islands

    3
    • Annette Island

      Annette Island

      Area
      348 km²
      High point
      272 m

      S. state of Alaska. It is at 55°08′06″N 131°27′21″W. It is about 18 km (11 mi) long and about 18 km (11 mi) wide. 407 sq mi). Annette Island is located west across the Revillagigedo Channel from the Alaska mainland and south of Revillagigedo Island.

    • Gravina Island

      Gravina Island

      Area
      249 km²
      High point
      832 m

      Gravina Island is an island in the Gravina Islands of the Alexander Archipelago in southeastern Alaska. It is 21 miles (34 km) long and about 9.5 miles (15.3 km) wide, with a land area of 94.81 square miles (245.6 km2). The island had a population of 50 people at the 2000 census.

    • Duke Island

      Area
      154 km²
      High point
      540 m

      S. state of Alaska and within Tongass National Forest. The island is just north of the Canada–United States border, about 30 miles (48 kilometres) south of Ketchikan and about 60 miles (97 kilometres) northwest of Prince Rupert, British Columbia. It is about 12 mi (19 km) long east–west and 10 mi (16 km) north-south.

    Minor islands

    5

    Islets

    67
    • Fripo Island26 m · 0.08 km²
    • Unnamed island5 m · 0.05 km²
    • Unnamed island24 m · 0.04 km²
    • Unnamed island17 m · 0.03 km²
    • Unnamed island32 m · 0.03 km²
    • Unnamed island2 m · 0.03 km²
    • Unnamed island23 m · 0.02 km²
    • Unnamed island36 m · 0.02 km²
    • Unnamed island3 m · 0.02 km²
    • Unnamed island4 m · 0.02 km²
    • Unnamed island22 m · 0.02 km²
    • Unnamed island21 m · 0.02 km²

    Rocks & skerries

    76
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha
    • Unnamed island<0.1 ha

    Figures

    Comparative heights

    Sea level500 m1,000 m832 mGravina540 mDuke272 mAnnette81 mMary63 mHemlock38 mGull36 mCat34 mDog26 mFripo20 mHeen14 mEmmet13 mVillage11 mMurdo9 mRuth
    High points by island, metres above sea level.

    Islands by area

    0.00010.0010.010.11101001,000Annette: 348 km²AnnetteGravina: 249 km²GravinaDuke: 154 km²DukeMary: 18.3 km²MaryDog: 2.9 km²DogCat: 2.4 km²CatHemlock: 0.72 km²HemlockUnnamed island: 0.13 km²Unnamed islandFripo: 0.08 km²FripoUnnamed island: 0.05 km²Unnamed islandUnnamed island: 0.04 km²Unnamed islandUnnamed island: 0.03 km²Unnamed islandUnnamed island: 0.03 km²Unnamed islandUnnamed island: 0.03 km²Unnamed islandUnnamed island: 0.02 km²Unnamed islandUnnamed island: 0.02 km²Unnamed islandUnnamed island: 0.02 km²Unnamed islandUnnamed island: 0.02 km²Unnamed islandUnnamed island: 0.02 km²Unnamed islandUnnamed island: 0.02 km²Unnamed islandUnnamed island: 0.02 km²Unnamed islandUnnamed island: 0.01 km²Unnamed islandGull: 0.01 km²GullUnnamed island: 0.01 km²Unnamed islandVillage: 1 haVillageMurdo: 0.9 haMurdoUnnamed island: 0.8 haUnnamed islandUnnamed island: 0.7 haUnnamed islandUnnamed island: 0.7 haUnnamed islandUnnamed island: 0.6 haUnnamed islandUnnamed island: 0.6 haUnnamed islandEmmet: 0.6 haEmmetUnnamed island: 0.6 haUnnamed islandUnnamed island: 0.5 haUnnamed islandUnnamed island: 0.5 haUnnamed islandUnnamed island: 0.5 haUnnamed islandUnnamed island: 0.4 haUnnamed islandUnnamed island: 0.4 haUnnamed islandUnnamed island: 0.4 haUnnamed islandUnnamed island: 0.3 haUnnamed island
    km², log scale
    Annette Island348 km²
    Gravina Island249 km²
    Duke Island154 km²
    Mary Island18.3 km²
    Dog Island2.9 km²
    Cat Island2.4 km²
    Hemlock Island0.72 km²
    Unnamed island0.13 km²
    Fripo Island0.08 km²
    Unnamed island0.05 km²
    Unnamed island0.04 km²
    Unnamed island0.03 km²
    Unnamed island0.03 km²
    Unnamed island0.03 km²
    Unnamed island0.02 km²
    Unnamed island0.02 km²
    Unnamed island0.02 km²
    Unnamed island0.02 km²
    Unnamed island0.02 km²
    Unnamed island0.02 km²
    Unnamed island0.02 km²
    Unnamed island0.01 km²
    Gull Island0.01 km²
    Unnamed island0.01 km²
    Village Island1 ha
    Murdo Island0.9 ha
    Unnamed island0.8 ha
    Unnamed island0.7 ha
    Unnamed island0.7 ha
    Unnamed island0.6 ha
    Unnamed island0.6 ha
    Emmet Island0.6 ha
    Unnamed island0.6 ha
    Unnamed island0.5 ha
    Unnamed island0.5 ha
    Unnamed island0.5 ha
    Unnamed island0.4 ha
    Unnamed island0.4 ha
    Unnamed island0.4 ha
    Unnamed island0.3 ha
    Unnamed island0.3 ha
    Unnamed island0.3 ha
    Unnamed island0.3 ha
    Unnamed island0.3 ha
    Unnamed island0.3 ha
    Heen Island0.3 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Ruth Island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.2 ha
    Unnamed island0.1 ha
    Goose Tongue Island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Snipe Island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Drug Island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Roy Island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha
    Unnamed island<0.1 ha

    Sources

    Facts

    • Geometry, areas and high points: OpenStreetMap contributors (ODbL), Copernicus GLO-30, via Talus.
    • Wikidata
    • Wikipedia

    Photographs