Roca Partida

Revillagigedo Islands.

Roca Partida (English: Split Rock) ranks as the smallest of the four Revillagigedo Islands, part of the Free and Sovereign State of Colima in Mexico. This uninhabited island encompasses an extremely small area, and many divers rank it among the most beautiful in Mexico. Divers must obtain permits from the Mexican Armed Forces to enter into this military zone.


The higher northwestern peak of Roca Partida with the southeastern peak hidden.

The four Revillagigedo Islands originated as volcanoes. San Benedicto Island and Socorro Island erupted in 1953 and 1993, respectively. Clarion Island and Roca Partida lack recent known eruptions. Erosion over millennia reduced Roca Partida to a piece of bare rock, devoid of terrestrial vegetation.

Roca Partida, 100 metres (300 ft) long and 8 metres (26 ft) wide, rises into two peaks. A low-lying bare rock area divides these two peaks, hence the name "Split Rock." The two peaks measured 25 metres (82 ft) and 34 metres (112 ft) high in 1953, but the higher peak apparently lost several meters (feet) since then, as the photographs illustrate.