Waskesiu Lake is a large, heavily visited lake situated within Prince Albert National Park in Saskatchewan, approximately 90 kilometres north-northwest of Prince Albert. The park offices and resort village of Waskesiu occupy the east shore, accessible via Highways 263 and 264. The lake supports a wide range of paddling activity, from casual hourly outings to multi-day backcountry expeditions, and draws paddlers of all experience levels.

There are three marinas and boat launches on the lake: the Main Marina (Waskesiu Lake Marina), the Narrows Marina, and the Hanging Heart Lakes Marina. Canoe, kayak, and paddleboard rentals are available at all three locations, as well as at the Grey Owl Center in the townsite. The Waskesiu Marina Adventure Centre operates from the May long weekend through Labour Day weekend. Rental kayaks include models from Wilderness Systems, Current Designs, Old Town, Necky, and Dagger. The marina will not send out watercraft within 30 minutes of thunder or lightning, or when wind gusts exceed 15 km/h, which signals that open-water conditions on this large lake can deteriorate quickly and warrant attention.

Personal watercraft such as Jet Skis, WaveRunners, and Sea-Doos are not permitted on park waters. As of April 15, 2025, all watercraft entering park waters require an Aquatic Invasive Species (AIS) Certification Permit. Parks Canada enforces a clean, drain, dry protocol to prevent the spread of invasive species such as zebra mussels. A National Park fishing licence is required for angling. All overnight backcountry paddlers must register at the Visitor Centre in Waskesiu before departure, and backcountry camping fees apply.

Several paddling routes originate in or near the lake. Short trips include the Waskesiu River, Trippes Beach to King Island, Hanging Heart Lakes, Amiskowan and Shady Lakes, and the Spruce River. The Bagwa Canoe Route, a multi-day option beginning on Kingsmere Lake to the northwest, involves up to 10 hours of paddling and a short portage; canoes can be transported to Kingsmere River Landing by the marina for a flat fee. Boats on Kingsmere Lake are restricted to under 40 horsepower.

The lake's fish species include lake trout, northern pike, walleye, yellow perch, cisco, lake whitefish, and burbot. Wildlife in the broader park ecosystem includes red-necked grebes, which nest along the Bagwa Channel during May through early July and should not be approached by paddlers.