Glacier Lake sits within the breathtaking wilderness of Nahanni National Park Reserve in the Northwest Territories, Canada, positioned at approximately 62°04′59″N, 127°33′W deep in the Mackenzie Mountains. This remote alpine lake is one of the most visually stunning fishing destinations in all of northern Canada, framed by the iconic Cirque of the Unclimables — a dramatic wall of sheer granite towers that rises directly from the lakeshore. The lake is accessible only by floatplane, making it a true backcountry experience that rewards anglers with solitude, pristine wilderness, and the kind of untouched fishery that has largely disappeared from more accessible parts of the continent. Simpson Air, the oldest continuously operated flying service in the Mackenzie Valley (established in the early 1960s), offers floatplane access to Glacier Lake and operates guided day tours that include a landing at the lake as part of broader Nahanni National Park excursions.