Mercredi Lake is a remote lake located in northern Alberta, situated in fishing subarea NB4 at approximately 59.94°N, 110.69°W. Its position in the far north of the province places it in a wilderness setting typical of the boreal region, and its remoteness is a defining characteristic that paddlers should factor into any trip planning.

The lake is open to angling year-round, which suggests it is accessible across seasons, though northern Alberta's climate means ice-free paddling conditions are generally limited to late spring through early fall. The presence of lake trout in the fishery is notable, as this species typically requires cold, well-oxygenated water, which may indicate good water quality and reasonable depth. Other fish species recorded include northern pike, yellow perch, and lake whitefish, reflecting a diverse cold-water ecosystem consistent with northern Alberta lakes.

No stocking events have been recorded for Mercredi Lake, indicating the fish populations are naturally sustained. The lake appears on Alberta's navigable waters mapping, suggesting it has been recognized as a navigable water body under provincial frameworks.

Given its remote northern location, paddlers should plan for self-sufficiency, as facilities and amenities are unlikely to be available on-site. Access to remote lakes in this part of Alberta often requires significant overland travel, and paddlers should verify road or trail access conditions well in advance of any trip. The combination of remoteness and year-round open status means the lake may see very little recreational traffic, which can be both an advantage for solitude and a consideration for safety planning. Paddlers venturing to Mercredi Lake should be prepared for wilderness conditions and carry appropriate emergency equipment.