From WoWWiki

Stone Cairn Lake is situated in northeastern Elwynn Forest, and holds one large island that gives the lake a characteristic ring shape. The lake is named for Heroes' Vigil the stone cairn monument erected upon the island to commemorate the losses of life during the First War.

While the lake has previously been a safe place to make pilgrimages to, it has recently fallen into the hands of Defias rogue wizards, who have settled on the island. The water also holds a tribe of murlocs, who have raised crude structures on the southern banks of the lake.

The name is possibly derived from the Blizzard game Diablo II. In one part of the story, players had to use the Cairn Stones to open a portal to continue their adventure.

Subzones of Elwynn Forest

Brackwell Pumpkin Patch • Crystal Lake • Eastvale Logging Camp • Echo Ridge Mine • Fargodeep Mine • Forest's Edge • Goldshire • Hall of Arms • Heroes' Vigil • Jasperlode Mine • Jerod's Landing • Library Wing • Lion's Pride Inn • The Maclure Vineyards • Main Hall • Mirror Lake • Mirror Lake Orchard • Northshire Abbey • Northshire River • Northshire Valley • Northshire Vineyards • Ridgepoint Tower • Stone Cairn Lake • The Stonefield Farm • Stormwind City • Thunder Falls • Tower of Azora • Westbrook Garrison