The Columbia Mountains are a group of mountain ranges along the Upper Columbia River in British Columbia, Montana, Idaho and Washington. The mountain range covers 135,952 km² (52,491 sq mi). The range is bounded by the Rocky Mountain Trench on the east, and the Kootenai River on the south; their western boundary is the edge of the Interior Plateau. Seventy-five percent of the range is located in Canada and the remaining twenty-five percent in the United States; American geographic classifications place the Columbia Mountains as part of the Rocky Mountains complex, but this designation does not apply in Canada (despite a British Columbia government tourism campaign to rebrand their southern portion as the "Kootenay Rockies"). Mount Sir Sandford is the highest mountain in the range, reaching . Mountain ranges The Columbia Mountains are made up of four large ranges containing many subranges: Cariboo Mountains Lunn Icefield Mowdish Range Premier Range Vimy Ridge Wavy Range Monashee Mountains Anstey Range Christina Range Gold Range Jordan Range Kettle River Range Malton Range Midway Range Ratchford Range Rossland Range Scrip Range Whatshan Range The Pinnacles Selkirk Mountains Asulkan Range Battle Range Big Bend Ranges Adamant Range Sir Sandford Range Windy Range Bishops Range Bonnington Range Clachnacudainn Range Dawson Range Duncan Ranges Badshot Range Goat Range Hermit Range Kokanee Range Slocan Ranges Lardeau Range Nelson Range Purity Range Sir Donald Range Valhalla Ranges Ruby Range Valkyr Range Norns Range Purcell Mountains (Percell Mountains in the United States) The Bugaboos Group Carbonate Range Dogtooth Range Farnham Group MacBeth Group McGillivary Range Moyie Range Septet Range Spillimacheen Range Starbird Ridge Commander Group Stockdale Group Toby Glacier Truce Group Yahk Range Additionally lower areas to the west of the main ranges are sometimes included in the description of the Cariboo Mountains: Quesnel Highland Gosse Range Palmer Range Goose Range Palmer Range Shuswap Highland Hunters Range Mabel Range Park Range Sawtooth Range Seymour Range Shuswap Range Silver Hills Trinity Hills Okanagan Highland Beaverdell Range Some classification systems end the Columbia Mountains at the North Thompson River, such that the Cariboo Mountains are assigned to the Interior Plateau. Where the Columbia Mountains meet the Interior Plateau there are intermediary areas known as highlands - the Quesnel Highland (west flank of the Cariboos), the Shuswap Highland (south of the Cariboos and west of the northern Monashees), and the Okanagan Highland (west of the southern Monashees). These are listed here but are