![Mount Hood reflected in Mirror Lake, Oregon](https://upload.wikimedia.org/wikipedia/commons/e/ef/Mount_Hood_reflected_in_Mirror_Lake%2C_Oregon.jpg)
This article comprises three sortable tables of
major mountain peaks[This article defines a significant summit as a summit with at least of ]topographic prominence
In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contou ...
, and a major summit as a summit with at least of topographic prominence. All summits in this article have at least 500 meters of topographic prominence. An ultra-prominent summit is a summit with at least of topographic prominence. of the
U.S.
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country Continental United States, primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., ...
State of Oregon.
The
summit
A summit is a point on a surface that is higher in elevation than all points immediately adjacent to it. The topography, topographic terms acme, apex, peak (mountain peak), and zenith are synonymous.
The term (mountain top) is generally used ...
of a mountain or hill may be measured in three principal ways:
#The
topographic elevation of a summit measures the height of the summit above a
geodetic sea level.
[All elevations in this article include an elevation adjustment from the ]National Geodetic Vertical Datum of 1929
The National Geodetic Vertical Datum of 1929 is the official name since 1973 of the vertical datum established for vertical control surveying in the United States of America by the General Adjustment of 1929. Originally known as Sea Level Datum ...
( NGVD 29) to the North American Vertical Datum of 1988
The North American Vertical Datum of 1988 (NAVD 88) is the vertical datum for orthometric heights established for vertical control surveying in the United States of America based upon the General Adjustment of the North American Datum of 1988.
...
( NAVD 88). For further information, please see this United States National Geodetic Surveybr>note
[If the elevation or prominence of a summit is calculated as a range of values, the ]arithmetic mean
In mathematics and statistics, the arithmetic mean ( ) or arithmetic average, or just the ''mean'' or the ''average'' (when the context is clear), is the sum of a collection of numbers divided by the count of numbers in the collection. The colle ...
is shown. The
first table below ranks the 30 highest major summits of Oregon by elevation.
#The
topographic prominence
In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contou ...
of a summit is a measure of how high the summit rises above its surroundings.
[The ]topographic prominence
In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contou ...
of a summit is the topographic elevation difference between the summit and its highest or key col to a higher summit. The summit may be near its key col or quite far away. The key col for Denali
Denali (; also known as Mount McKinley, its former official name) is the highest mountain peak in North America, with a summit elevation of above sea level. With a topographic prominence of and a topographic isolation of , Denali is the thir ...
in Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., ...
is the Isthmus of Rivas in Nicaragua
Nicaragua (; ), officially the Republic of Nicaragua (), is the largest country in Central America, bordered by Honduras to the north, the Caribbean to the east, Costa Rica to the south, and the Pacific Ocean to the west. Managua is the cou ...
, away.[ The second table below ranks the 30 most prominent summits of Oregon.
#The ]topographic isolation
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 ...
(or radius of dominance) of a summit measures how far the summit lies from its nearest point of equal elevation.[The ]topographic isolation
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 ...
of a summit is the great-circle distance
The great-circle distance, orthodromic distance, or spherical distance is the distance along a great circle.
It is the shortest distance between two points on the surface of a sphere, measured along the surface of the sphere (as opposed to a ...
to its nearest point of equal elevation. The third table below ranks the 30 most isolated major summits of Oregon.
__TOC__
Highest major summits
Of the highest major summits of Oregon, five peaks exceed elevation and 28 peaks exceed elevation.
Most prominent summits
Of the most prominent summits of Oregon, Mount Hood
Mount Hood is a potentially active stratovolcano in the Cascade Volcanic Arc. It was formed by a subduction zone on the Pacific coast and rests in the Pacific Northwest region of the United States. It is located about east-southeast of Portlan ...
exceeds of topographic prominence
In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contou ...
. Four peaks are ultra-prominent summits with more than of topographic prominence and 12 peaks exceed of topographic prominence.
Most isolated major summits
Of the most isolated major summits of Oregon, Sacajawea Peak and Steens Mountain
Steens Mountain is in the southeastern part of the U.S. state of Oregon, and is a large fault-block mountain. Located in Harney County, it stretches some north to south, and rises from the west side the Alvord Desert at elevation of about to a ...
exceed of topographic isolation and Mount McLoughlin
Mount McLoughlin is a dormant steep-sided stratovolcano, or composite volcano, in the Cascade Range of southern Oregon and within the United States Sky Lakes Wilderness. It is one of the volcanic peaks in the Cascade Volcanic Arc, within the Hi ...
exceeds of topographic isolation.
Gallery
Portland&MtHood.jpg, Mount Hood
Mount Hood is a potentially active stratovolcano in the Cascade Volcanic Arc. It was formed by a subduction zone on the Pacific coast and rests in the Pacific Northwest region of the United States. It is located about east-southeast of Portlan ...
Mt. Jefferson from Three Fingered Jack.JPG, Mount Jefferson
Three sisters2.jpg, South Sister, Middle Sister, and North Sister
Ice Lake, Sacajawea Peak.jpg, Sacajawea Peak
Steens Mountain near Andrews, Oregon.jpg, Steens Mountain
Steens Mountain is in the southeastern part of the U.S. state of Oregon, and is a large fault-block mountain. Located in Harney County, it stretches some north to south, and rises from the west side the Alvord Desert at elevation of about to a ...
MtMcLoughlin.jpg, Mount McLoughlin
Mount McLoughlin is a dormant steep-sided stratovolcano, or composite volcano, in the Cascade Range of southern Oregon and within the United States Sky Lakes Wilderness. It is one of the volcanic peaks in the Cascade Volcanic Arc, within the Hi ...
Mt. Thielsen.jpg, Mount Thielsen
Mount Thielsen, or Big Cowhorn ( Klamath: hisc’akwaleeʔas), is an extinct shield volcano in the Oregon High Cascades, near Mount Bailey. Because eruptive activity ceased 250,000 years ago, glaciers have heavily eroded the volcano's st ...
See also
* List of mountain peaks of North America
**List of mountain peaks of Greenland
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All ...
**List of mountain peaks of Canada
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All s ...
**List of mountain peaks of the Rocky Mountains
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All ...
** List of mountain peaks of the United States
*** List of mountain peaks of Alaska
***List of mountain peaks of Arizona
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All ...
*** List of mountain peaks of California
*** List of mountain peaks of Colorado
***List of mountain peaks of Hawaii
This article comprises three sortable tables of the 13 major mountain peaks of the Hawaiian Islands and the U.S. State of Hawaii. Each of these 13 major summits has at least of topographic prominence.
The summit of a mountain or hill may ...
***List of mountain peaks of Idaho
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All ...
*** List of mountain peaks of Montana
*** List of mountain peaks of Nevada
***List of mountain peaks of New Mexico
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All ...
***
**** List of mountains of Oregon
****List of mountain ranges of Oregon
There are at least 50 named mountain ranges in the United States, U.S. state of Oregon. Many of these ranges extend into the neighboring states of California, Idaho, Nevada, and Washington (state), Washington. Elevations and coordinates ar ...
***List of mountain peaks of Utah
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All ...
***List of mountain peaks of Washington (state)
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All s ...
***List of mountain peaks of Wyoming
This article comprises three sortable tables of Summit, major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence ...
** List of mountain peaks of México
**List of mountain peaks of Central America
Article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All summit ...
** List of mountain peaks of the Caribbean
*Oregon
Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...
** Geography of Oregon
*** :Mountains of Oregon
**** commons:Mountains of Oregon
*Physical geography
Physical geography (also known as physiography) is one of the three main branches of geography. Physical geography is the branch of natural science which deals with the processes and patterns in the natural environment such as the atmosphere, h ...
**Topography
Topography is the study of the forms and features of land surfaces. The topography of an area may refer to the land forms and features themselves, or a description or depiction in maps.
Topography is a field of geoscience and planetary sci ...
*** Topographic elevation
***Topographic prominence
In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contou ...
***Topographic isolation
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 ...
Notes
References
External links
United States Geological Survey (USGS)
Geographic Names Information System @ USGS
United States National Geodetic Survey (NGS)
Geodetic Glossary @ NGS
NGVD 29 to NAVD 88 online elevation converter @ NGS
Survey Marks and Datasheets @ NGS
Bivouac.com
Peakbagger.com
Peaklist.org
Summitpost.org
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Lists of landforms of Oregon
Oregon, List Of Mountain Peaks Of
Oregon, List Of Mountain Peaks Of
Oregon, List Of Mountain Peaks Of
Oregon, List Of Mountain Peaks Of
Oregon, List Of Mountain Peaks Of