Quartet Lakes adopted in the 18th Report of the Geographic Board of Canada, 31 March 1924, as labelled on International Boundary Commission sheet 6, published 1913 from surveys of 1904, and as labelled on Dominion sectional sheet 11, Yale, 1921. The collective name, Quartet Lakes, was rescinded 5 November 1953 and individual names were adopted for each lake: Thunder Lake, Strike Lake, Flash Lake & Lightning Lake - the local names identifed by BC Parks Ranger (file M.1.50). Coordinates of Lightning Lake adjusted 18 December 1968 on 92H/SE, to compensate for increased pondage.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

This lake is labelled "Mountain Lake" on Dominion Sectional sheet #11, Yale, 1921.

Source: BC place name cards, files, correspondence and/or research by BC Chief Geographer/Geographical Names Office.

Northernmost of the "Quartet Lakes," individually named Lightning, Flash, Strike and Thunder. Note that Lightning Lake drains northeast into Little Muddy Creek, NOT southwest through Lightning Creek like the other 3 lakes. Control structures installed in the 1960's have raised the water level; Lightning Lake now incorporates the waterbody long-identified as "Beavertree Lake" in BC Parks records (pre-1940 ?). At high water Lightning Lake drains both ways.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office