The Détroit de Jacques-Cartier is a significant marine strait in the Gulf of St. Lawrence, separating the North Shore of Quebec's Minganie region from Anticosti Island. This open coastal waterway is characterized by its funnel-like geography, which has a pronounced effect on local conditions. The easterly wind is known to be particularly strong here, channeled between the land masses to produce a significant swell, especially over the Bancs de Mingan. This makes wind exposure and wave action a primary safety consideration for paddlers, requiring careful assessment of weather forecasts and sea state before any trip.

The adjacent Mingan Archipelago is renowned as a sea kayaking paradise, offering a logical and spectacular paddling route. This national park reserve features a shoreline punctuated by impressive limestone monoliths and a protected natural environment. The town of Havre-Saint-Pierre, with its beach and nearby Longue-Pointe-de-Mingan, serves as a major gateway to the archipelago and the strait. Paddlers can expect a raw, expansive maritime environment where the St. Lawrence takes on the appearance of an ocean. The area is rich in marine wildlife; notable sightings in the strait have included the endangered North Atlantic right whale, humpback whales, fin whales, and various seals, including seasonal migrations of harp seals. The view from the Belvédère de la montagne Ronde near Havre-Saint-Pierre offers a panoramic lookout over the strait, which is also a known whale-watching vantage point. Given the exposed nature, cold water temperatures, strong winds, and potential for heavy swell, this area is suitable only for experienced, well-equipped sea kayakers familiar with open coastal navigation and self-rescue in dynamic conditions.