Angle Calculations

Summit Steepness By Quad Elevation Variation By Quad

Peak Lists:

Canadian Summits

Western US Summits

Alaska 10k+ Summits
Arizona Summits
California Summits
Colorado Summits
Idaho Summits
Montana Summits
Hawaii Summits
Montana Summits
Nevada Summits
New Mexico Summits
Oregon Summits
Utah Summits
Washington Summits
Wyoming Summits

Conneticut Summits
Maine Summits
Massachusetts Summits
New Hampshire Summits
New York Summits
North Carolina Summits
South Carolina Summits
Tennessee Summits
Vermont Summits
Virginia Summits
West Virginia Summits

North Dakota Summits
Oklahoma Summits
South Dakota Summits
Texas Summits

External Links:

ORS(Spire Measure)
Google Maps

Elevation Analysis using the National Elevation Dataset

Isolation Limit Points

The Isolation of a summit is defined as the distance from that summit to the next nearest higher ground. The location of the nearest higher ground, usually a point on a slope, is called the Isolation Limit Point(ILP). Due to the difficulty in finding the exact location of the ILP, isolation is often reported as the distance from a given summit to its closest higher summit, which provides a good approximate value.

With the right algorithm and accurate digital data it is possible the find ILP locations without tedious mapwork. Below is a listing of isolation values(in miles) along with isolation limit points for summits in Colorado(west of 104.5W longitude) and utah. Error range for ILP locations is 30m. Any summits whose isolation is within 30m of its nearest higher summit retains the original summit to summit isolation value. The list below are not final - some summits were not calculated due to unknown issues with the digital elevation model - see lists below.

Click on the adjusted isolation figure for a map representation of isolation. Click on the coordinates for a map of the isolation limit point, with a circle enclosing the geographic error range.

Summit to Summit isolation values taken with permission from John Kirk, listsofjohn.com. Isolation and Isolation Limit Point concepts by Greg Slayden, peakbagger.com.

The lists below are preliminary, and still contain some errors.


Text Copyright Tim Worth, 2007-2011.
Email: tim.worth5 (AT) gmail (DOT) com
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