Cheakamus Lake is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in Garibaldi Provincial Park

Garibaldi Provincial Park

Garibaldi Provincial Park, also called Garibaldi Park, is a wilderness park located in British Columbia, Canada, about 70 kilometres north of Vancouver. The park is located to the east of the Sea to Sky Highway between Squamish and Whistler and covers an area of over 1,950 square kilometres...

 on the southeastern outskirts of the resort municipality of Whistler, British Columbia

Whistler, British Columbia

Whistler is a Canadian resort town in the southern Pacific Ranges of the Coast Mountains in the province of British Columbia, Canada, approximately north of Vancouver...

. It has an area of 5.7 km² (2.2 mi²). It is an expansion of the upper Cheakamus River

Cheakamus River

The Cheakamus River is a tributary of the Squamish River, beginning on the west slopes of Outlier Peak in Garibaldi Provincial Park upstream from Cheakamus Lake on the southeastern outskirts of the resort area of Whistler. The river flows into Cheakamus Lake before exiting it and flowing...

, with the river entering it at its east end and exiting at the west end.

In 2005, 40,000 litres of sodium hydroxide was spilled into the Cheakamus River, well downstream of the lake, as a result of a CN train derailment.