Skip to content
Archipelago

    Pacific OceanMexico

    21°29′N 106°27′W

    Islas Marías

    The Islas Marías ("Mary Islands") make up an archipelago in Mexico, consisting of four principal islands and five smaller islands/large offshore rocks. They are located in the Pacific Ocean, some 100 km (62 mi) off the coast of the state of Nayarit and about 370 km (230 mi) southeast of the tip of Baja California.

    Chart

    4 landforms

    Overview

    The Islas Marías ("Mary Islands") make up an archipelago in Mexico, consisting of four principal islands and five smaller islands/large offshore rocks. They are located in the Pacific Ocean, some 100 km (62 mi) off the coast of the state of Nayarit and about 370 km (230 mi) southeast of the tip of Baja California. They are part of the municipality (municipio) of San Blas, Nayarit. The islands were used as a penal colony until February 18, 2019, when President Andrés Manuel López Obrador ordered the closure of its operation as Islas Marías Federal Prison. The first European to encounter the islands was Diego Hurtado de Mendoza, a cousin of Hernán Cortés in 1532, who gave them the name Islas Magdalenas. He found no evidence of prior habitation by the Native Americans. In 2010 the archipelago was designated the Islas Marías Biosphere Reserve by UNESCO.

    From Wikipedia, CC BY-SA 4.0

    Census, cataloged

    • Major islands2
    • Minor islands2
    • Islets0
    • Rocks & skerries0

    Major islands

    2

    Minor islands

    2

    Also in the area

    2

    Inside the group's outline but not confirmed as members by any source.

    Figures

    Comparative heights

    Sea level200 m400 m600 m800 m636 mIsla María Madre573 mIsla María Magdalena381 mIsla María Cleofas67 mSan Juanito64 mIsla Piedra Blanca25 mRoca Piedra el Morro
    High points by island, metres above sea level.

    Islands by area

    0.010.11101001,000Isla María Madre: 141 km²Isla María MadreIsla María Magdalena: 67.5 km²Isla María Magdal…Isla María Cleofas: 18.7 km²Isla María CleofasSan Juanito: 8.6 km²San JuanitoIsla Piedra Blanca: 0.15 km²Isla Piedra BlancaRoca Piedra el Morro: 0.03 km²Roca Piedra el Mo…
    km², log scale
    Isla María Madre141 km²
    Isla María Magdalena67.5 km²
    Isla María Cleofas18.7 km²
    San Juanito8.6 km²
    Isla Piedra Blanca0.15 km²
    Roca Piedra el Morro0.03 km²

    Sources

    Facts

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

    Photographs