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  1. An ultra-prominent peak, or ultra for short, is a mountain summit with a topographic prominence of 1,500 metres (4,900 ft) or more; it is also called a P1500. The prominence of a peak is the minimum height of climb to the summit on any route from a higher peak, or from sea level if there is no higher peak.

  2. Die Liste der prominentesten Berge der Alpen führt alle Berge in den Alpen an, deren Schartenhöhe größer als 1500 Meter ist. Berge dieser Kategorie werden bisweilen auch als Ultra Prominent Peaks bezeichnet.

  3. The (prominence) parent peak of peak A can be found by dividing the island or region in question into territories, by tracing the two hydrographic runoffs, one in each direction, downwards from the key col of every peak that is more prominent than peak A. The parent is the peak whose territory peak A is in.

  4. By descending to 1,500 m of prominence, this list includes all the Ultras of the Alps. Some famous peaks, such as the Matterhorn and Eiger, are not Ultras because they are connected to higher mountains by high cols and therefore do not achieve enough topographic prominence.

  5. Large numbers of ultras languish in relative obscurity; minor range highpoints in the American West or Central Asia, rocky peaks extending above the Antarctic icecap, isolated foothills in the Italian Alps, and unnamed summits in the B.C. Coast Ranges.