Geography of the North Cascades
The geography of the North Cascades describes a range of rugged mountains in British Columbia, Canada and Washington, United States. In Canada, the range is officially named the Cascade Mountains but is commonly referred to as the Canadian Cascades.
The Fraser River and Similkameen River in British Columbia form the northern boundary of the North Cascades. On the east, the Okanogan River and the Columbia River bound the range. On the west within the United States, the foothills of the range are separated by a narrow coastal plain from Puget Sound, whereas in Canada there are few if any foothills and the range drops steeply to the floodplain of the Fraser Lowland.
The southern boundary of the North Cascades is less definite. For the purposes of this article, it will be taken as US Highway 2, running over Stevens Pass, or equivalently, the Skykomish River, Nason Creek, and the lower Wenatchee River. This roughly follows Beckey's division.:17 Sometimes the southern boundary is defined by Snoqualmie Pass and the approximate route of Interstate 90.
There are various formally named subranges, and some informally named ones. Formally named subranges include the:
Informally named ranges include the Coquihalla Range, which lies between the Coquihalla River and the Fraser Canyon south of an imaginary line roughly connecting Coquihalla Pass with the town of Boston Bar. The Coquihalla Range includes a group of horn-like summits known as the Anderson River Group, also known as the Llamoid Group due to conferred names such as Vicuna Peak, Yak Peak, Guanaco Peak, etc.
The North Cascades include various protected areas. Chief among the areas in Washington is North Cascades National Park, occupying much of the area between Mount Baker and the Cascade divide. Contiguous with the Park are Ross Lake National Recreation Area and Lake Chelan National Recreation Area. Designated wilderness areas in the range include:
- Mount Baker Wilderness
- Glacier Peak Wilderness
- Boulder River Wilderness
- Henry M. Jackson Wilderness,
- Lake Chelan-Sawtooth Wilderness
- Noisy-Diobsud Wilderness
- Pasayten Wilderness
- Stephen Mather Wilderness
- Wild Sky Wilderness
In British Columbia, protected areas include
The following North Cascades peaks are notable for their height (absolute elevation):
|Mountain||Height||Coordinates||Prominence||Parent mountain||First ascent|
|Mount Baker||10,778||3,285||8,881||2,707||Mount Rainier||1868 by Edmund T. Coleman and party|
|Glacier Peak||10,541||3,213||7,501||2,286||Mount Rainier||1898 by Thomas Gerdine|
|Bonanza Peak||9,511||2,899||3,711||1,131||Glacier Peak||1937 by Curtis James, Barrie James, Joe Leuthold|
|Mount Fernow||9,249||2,819||2,809||856||Bonanza Peak||1932 by Oscar Pennington, Hermann Ulrichs|
|Goode Mountain||9,220||2,810||3,800||1,200||Bonanza Peak||1936 by Wolf Bauer, Philip Dickett, Joe Halwax, Jack Hossack, George MacGowan|
(The above table uses a topographic prominence cutoff of 1,000 feet (300 m), in order to list only highly independent peaks.)
The following peaks are notable for their topographic prominence:
|Mount Baker||10,778||3,285||8,881||2,707||Mount Rainier|
|Glacier Peak||10,541||3,213||7,501||2,286||Mount Rainier|
|Round Mountain||5,320||1,620||4,780||1,460||Mount Baker|
|Mount Spickard||8,979||2,737||4,779||1,457||Mount Baker|
|Welch Peak||7,976||2,431||4,728||1,441||Robinson Mountain|
|Three Fingers||6,850||2,090||4,490||1,370||Glacier Peak|
|Mount Shuksan||9,131||2,783||4,411||1,344||Mount Baker|
|Remmel Mountain||8,684||2,647||4,370||1,330||Mount Lago|
|Mount Prophet||7,650||2,330||4,080||1,240||Three Fingers|
|Mount Outram||8,074||2,461||3,678||1,121||Hozomeen Mountain|
|Mount Lago||8,743||2,665||3,300||1,000||Silver Star Mountain|
The following peaks are notable for their large, steep rise above local terrain. Peaks are listed in descending order by elevation.
|North Gardner Mountain||8,956||2,730|
|American Border Peak||7,994||2,437|
The North Cascades are known for having many extremely tall glacial-fed waterfalls; the ten highest measured waterfalls are listed.
|Colonial Creek Falls||2,584||788||Colonial Creek||Diablo Lake|
|Johannesburg Falls||2,465||751||Unnamed||Below Johannesburg Peak, near Mount Torment|
|Sulphide Creek Falls||2,182||665||Sulphide Creek||Eastern boundary of North Cascades National Park|
|Silver Lake Falls||2,128||649||Silver Creek||Near Mount Spickard in North Cascades National Park|
|Blum Basin Falls||1,680||510||Blum Creek||Below Mount Blum|
|Boston Creek Falls||1,627||496||Boston Creek||Near North Fork Cascade River|
|Torment Falls||1,583||482||Torment Creek||Near North Fork Cascade River|
|Green Lake Falls||979||298||Unnamed fork of Bacon Creek||Near Green Lake in North Cascades National Park|
|Depot Creek Falls||967||295||Depot Creek||Near Mount Redoubt, North Cascades National Park|
|Rainy Lake Falls||800||240||Unnamed||Rainy Lake, Okanogan National Forest|
 Many tall waterfalls occur where meltwater from mountain glaciers drop down a headwall, which are common occurrences in the North Cascades. Many waterfalls, despite their great height, are non-notable as they are not clearly visible and often have low volume. Seahpo Peak Falls, despite its great height at nearly 2,200 feet (670 m), is an example of one of these waterfalls. A few notable exceptions do occur; Sulphide Creek Falls occurs where meltwaters from two of the largest Mount Shuksan glaciers are forced through a narrow chute over a 2,183-foot (665 m) headwall at the head of Sulphide Valley.
Geographical features in the area of the North Cascades National Park can be found in this image map:
- Beckey, Fred (1987). Cascade Alpine Guide. 1 (2nd ed.). The Mountaineers. ISBN 0-89886-152-7.
- "Level III and Level IV Ecoregions of the Northwestern United States" (PDF). Western Ecology Division. U.S. Environmental Protection Agency.
- "Mount Shuksan, Washington". Peakbagger.com. Retrieved 16 September 2010.
- "Showing All Waterfalls In Washington". Bryan Swan and Dean Goss. World Waterfall Database. Retrieved 2009-05-19.