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