Williams Lake is a city in the Central Interior of British Columbia, in the central part of a region known as the Cariboo. Williams Lake is one of the largest cites, by population of metropolitan area, in the Cariboo after neighbouring Quesnel. The city is famous for the Williams Lake Stampede, which was once the second largest professional rodeo in Canada, after only the Calgary Stampede.

The British Columbia Interior, popularly referred to as the BC Interior or simply the Interior, is a geographic region of the Canadian province of British Columbia. While the exact boundaries are variously defined, the British Columbia Interior is generally defined to include the 14 regional districts that do not have coastline along the Pacific Ocean or Salish Sea, and are not part of the Lower Mainland. Other boundaries may exclude parts of or even entire regional districts, or expand the definition to include the regional districts of Fraser Valley, Squamish–Lillooet, and Kitimat–Stikine.