Adopted in Nomenclature of the Mountains of Western Canada, published 2 April 1918 by the Geographic Board of Canada; confirmed in 1936 on Geological Survey sheet 421A, Hope, as identified in BC Mines Bulletin 48: Landforms of British Columbia.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

Includes Skagit Range, Hozameen Range & Okanagan Range. Extent in British Columbia: bounded on the west by Fraser River, on the north by Thompson River, on the east by Nicomen River - Lawless Creek - Tulameen River - Copper Creek - Similkamen River. This is known as "Cascade Range" in Washington and Oregon States.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

The following is an excerpt with citations from Oregon Historical Quarterly, Vol XXVI, December 1925, p.375-380: "The Cascade Range is the great mountain backbone of Oregon and Washington...Probably the first attempt at a name for the range was by the Spaniard, Manuel Quimper, 1790, who roughly mapped it as "Sierra Madras de S. Antonio". In 1792, George Vancouver gave names to a number of the most prominent peaks, but referred to the range as "snowy range", "ridge of snowy mountains" or "range of rugged mountains". Lewis and Clark, 1805-06, mention the named peaks and frequently refef in general terms to the range of mountains. Lewis wrote: "The range of western mountains are covered with snow..." (Journals... Vol IV, pp.305, 306 & 313). "Western Mountains" is the nearest to a name for the range adopted by Lewis and Clark. John Work of the Hudson's Bay Company, wrote in December 1824: "A ridge of high mountains covered with snow..." (Washington Historical Quarterly, Vol III, pp 213, 215). David Douglas, the botanist, in writing his journal, had great need of a name for these mountains and he seems to have been the first one to use the name "Cascade". He refers again and again to the "Cascade Mountains" or "Cascade Range of Mountains" (Journals... 1823-1827, pp 221-222, 252, 257, 342). Douglas does not claim to have originated the name for the range, and earlier use of it may yet come to light. William A. Slacum's report, 1836-37, says the mountains were sometimes called "Klannet range, from the Indians of that name" (Oregon Historical Society Quarterly, Vol XIII, p.200). Hall J. Kelley of Boston, an early enthusiast on the Oregon Question...campaigned unsuccessfully 1834-39 to change the names of the great peaks by calling them after former presidents of the United States and to christen the range "Presidents Range". The Wilkes Expedition, 1841, charted the mountains as Cascade Range."

Source: Provincial Archives of BC "Place Names File" compiled 1945-1950 by A.G. Harvey from various sources, with subsequent additions