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