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A Ribu (pronounced ree-boo) is a mountain with a topographic prominence of at least 1,000 metres (3,281 ft).[1] "Ribu" is a Malay and Indonesian word meaning "thousand".[2]
There are 7,150 Ribus across the world including 932 Ribus in Canada, 893 Ribus in China and 643 Ribus in the USA.[3] There are 145 countries or territories with at least one Ribu. 1,566 of the 7,150 Ribus are also Ultras.
Between 2019 and 2024, an international project took place to identify all of the Ribus across the world.[4][5] This project culminated in the publication of "The Relative Mountains of Earth: The Ribus" by Daniel Patrick Quinn (published in November 2024 by Pedantic Press) [6] and an official website listing all of the Ribus by continent and region [7] where the latest version of the list can be downloaded and amendments to the database can be proposed.
Famous Ribus include Everest, Matterhorn, Mont Blanc, Vesuvius, Denali, Kilimanjaro, Table Mountain, Gunung Kinabalu, Snowdon and Ben Nevis.
As of late 2024, a follow-up project is underway to identify Ribus of the Moon and Mars [8].