Williston Lake is Canada's largest man-made reservoir, a vast and remote wilderness fishery located in northern British Columbia near the town of Mackenzie. Created by the W.A.C. Bennett Dam on the Peace River, this enormous body of water stretches across the landscape of the northern Rocky Mountain foothills, encompassing roughly 25,000 hectares of surface area. The lake sits within BC's Freshwater Fisheries Region 7, straddling both the Omineca (7A) and Peace (7B) management zones. Its sheer scale, low angling pressure, and diverse fish community make it one of the most compelling wilderness fishing destinations in western Canada. Water clarity is generally low throughout the reservoir, with Secchi depths averaging 3–4 meters in the Peace Reach, reaching a maximum of about 7 meters near the Clearwater River inflow and dropping to as little as 1.5 meters near the forebay. The lake is dimictic, meaning it stratifies thermally twice per year, with summer surface temperatures in the Peace Reach typically reaching 14–16°C in the epilimnion, which can extend 30–40 meters deep.