Idaho's 25-Mile Isolation Peaks

Idaho's 25-Mile Isolation Peaks

Page Type Page Type: List
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What is the 25-Mile Isolation List?

Just as 2000' is an important prominence threshold and 14000' an important elevation threshold, 25 miles is the magic number that gives a peak a spot on an isolation list. This page contains those peaks with 25 miles of isolation which are in the U.S. State of Idaho. But what is isolation anyway? Isolation is how far a peak is from the nearest higher one. Understandably, isolated peaks are often also high in elevation, are very topographically prominent, or, in some cases, both. Idaho is no exception as the state's highest and most prominent peak is also its most isolated, and, indeed, all of the peaks on this list but one--and even that is an Error Range peak--are also on the Idaho 2KPs page, and none are under 7000' in height.

Contained below is a table containing the peak's name--which has a hyperlink to the peak page--as well as its isolation, elevation, and topographical prominence. So, without further ado, the Idaho isolation list.

The Idaho 25-Mile Isolation List

Data taken from the Peakbagger page and the Idaho 2KPs page.

ID Rank Peak Name Isol. (Mi.) Elev. (Ft.) Prom. (Ft.)
1 Borah Peak 150.8 12,662 5,982
2 Cache Peak 81.8 10,339 4,479
3 Hayden Peak 71.5 8,403 3,133
4Mount McGuire
39.7 10,082 3,542
5 Bonneville Peak 34.1 9,271 3,401
6 Buffalo Hump 33.1 8,938 3,438
7 Diamond Peak 31.8 12,197 5,387
8North Loon Mountain 31.7 9,322 2,974
9 He/She Devil 31.5 9,420 5,240
10Hyndman Peak 30.1 12,009 4,829
11 White Mountain 29.6 10,442 3,772
12 South Selkirk Crest 29.5 7,709 3,374
13 Castle Peak 27.3 11,815 4,035
14 Fenn Mountain 26.9 8,021 1,979
15Oxford Peak 26.6 9,282 4,030
16 Lem Peak 26.5 10,985 2,485

Additions & Corrections

If there are any errors--which there may well be, as I have never lived in Idaho--feel free to contact me.


Add any images of these peaks here.


Children refers to the set of objects that logically fall under a given object. For example, the Aconcagua mountain page is a child of the 'Aconcagua Group' and the 'Seven Summits.' The Aconcagua mountain itself has many routes, photos, and trip reports as children.