This is a list of the mountains of the Alps, ordered by their topographic prominence. For a list by height, see the list of mountains of the Alps. 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.
Where the prominence parent and the island parent differ, the prominence parent is marked with "1" and the island parent with "2" (with Mont Blanc abbreviated to MB). The column "Col height" denotes the lowest elevation to which one must descend from a peak in order to reach peaks with higher elevations; note that the elevation of any peak is the sum of its prominence and col. The column "Col location" denotes the pass where the col height is located.
In topography, prominence measures the height of a mountain or hill's summit relative to the lowest contour line encircling it but containing no higher summit within it. It is a measure of the independence of a summit. The key col ("saddle") around the peak is a unique point on this contour line and the parent peak is some higher mountain, selected according to various criteria.
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. There are approximately 1,524 such peaks on Earth. Some well-known peaks, such as the Matterhorn and Eiger, are not ultras because they are connected to higher mountains by high cols and thus do not achieve enough topographic prominence.
The topographic isolation of a summit is the minimum distance to a point of equal elevation, representing a radius of dominance in which the peak is the highest point. It can be calculated for small hills and islands as well as for major mountain peaks and can even be calculated for submarine summits.