| Monashee Mountains are a mountain range | | | | River before the construction of the |
| in British Columbia, Canada covering the | | | | Grand Coulee Dam) in Washington State. |
| areas of British Columbia (78%) and | | | | Some definitions may place the northern |
| Washington (22%) and extending 530 km | | | | limit at the Coldstream Valley, east of |
| from north to south and 150 km from east | | | | Vernon, British Columbia, as that is the |
| to west. They belong to the Columbia | | | | southern limit of the Shuswap Highland. |
| mountain range. Neighbouring in the west | | | | To the east of the Okanagan Highland are |
| are the Selkirk Mountains. Monashee | | | | the Monashee Mountains, some definitions |
| Mountains are limited from the east by | | | | of which include the Okanagan Highland |
| Columbia River and Arrow Lakes, to the | | | | as well as portions of the Shuswap |
| west by upper North Thompson River, | | | | Highland. |
| Shuswap Lake and Okanagan Lake. Its | | | | The Thompson Plateau is the southernmost |
| north end is in Robson Valley at | | | | portion of the Interior Plateau of |
| Valemount BC. Peaks include Hallam Peak | | | | British Columbia, Canada, lying between |
| (3,205 m) and Cranberry Mountain (2,872 | | | | Okanagan Lake and the Thompson River. |
| m). Between Revelstoke and Shuswap Lake | | | | Its southwestern edge abuts the Canadian |
| the range is crossed by Highway 1, the | | | | Cascades portion of the Cascade Range, |
| Trans-Canada Highway and the mainline of | | | | more or less following the line of the |
| the Canadian Pacific Railway thorough | | | | Similkameen River, its tributary the |
| Eagle Pass. Monashee Mountains' southern | | | | Tulameen River, and a series of passes |
| end is a subject of major mining | | | | from the area of Tulameen, British |
| activities. | | | | Columbia to the confluence of the |
| In some descriptions of the Monashees, a | | | | Thompson River with the Nicoamen River, |
| region known as the Okanagan Highland is | | | | a few miles east of Lytton, British |
| included. It lies between the Kettle | | | | Columbia. Its northwestern edge runs |
| River and Okanagan Lake, south of the | | | | approximately from the city of Vernon, |
| Shuswap River. Within this area is the | | | | British Columbia through the valley of |
| small Sawtooth Range, which lies between | | | | Monte Creek to the junction of the same |
| the uppermost Shuswap River (E) and | | | | name just east of the city of Kamloops. |
| Mabel Lake (W). | | | | Northeast of that line is the Shuswap |
| Also sometimes included is the portion | | | | Highland. |
| of the Shuswap Highland south of the | | | | Some definitions include the Bonaparte |
| North Thompson River, the boundary of | | | | Plateau, which lies in the angle of the |
| which extends south to the Okanagan | | | | Thompson and Bonaparte Rivers, and south |
| Highland. | | | | of the uppermost reaches of that river |
| Mountains | | | | and a small tributary of the North |
| Mount Monashee 3274m | | | | Thompson, Lemieux Creek. |
| Hallam Peak 3205m | | | | The dominant landscape of the Thompson |
| Thor Mountain 3146m | | | | Plateau is a high, almost plains-like |
| Mount Odin 2971m | | | | rangeland fairly heavily forested with |
| Cranberry Mountain 2872m | | | | subalpine forest and tamarack swamp, |
| The Pinnacles 2607m | | | | plunging steeply to the valleys of the |
| The Okanagan Highland, also known as the | | | | Thompson and Okanagan on its outer |
| Okanogan Highland in the United States, | | | | perimeter. In its core is the broad and |
| is a plateau-like hilly area in British | | | | open rangeland of the Nicola Valley, at |
| Columbia, Canada. It lies between the | | | | the focus of which is the town of |
| Okanagan Valley on its west and the | | | | Merritt, British Columbia. Towards its |
| Kettle River on its east, and | | | | southern edges, the plateau is fairly |
| geologically is more or less an | | | | mountainous and includes the ski area at |
| extension of the Thompson Plateau, which | | | | Apex, British Columbia, as well as the |
| lies west of the Okanagan. Its northern | | | | small but rugged Okanagan Range which |
| perimeter is the valley of the Shuswap | | | | runs south from there to the confluence |
| River, while its southern limit is the | | | | of the Similkameen and Okanagan Rivers. |
| FDR Reservoir (formerly the Columbia | | | | |