Three species of Pacific salmon have been introduced to Lake Superior in the past few decades and now reproduce naturally in the lake. All feed in the big lake until they reach sexual maturity. In the fall, all three species swim up rivers to spawn and die, completing their life cycle.

Yes, Lake Superior is home to several species of salmon, though they are not native to the Great Lakes. The most prominent species found in 2026 are Chinook (King) Salmon and Coho Salmon, which were introduced in the mid-20th century to control invasive alewife populations and create a recreational fishery. Additionally, you can find Pink Salmon, which were accidentally introduced in 1956 and have since established self-sustaining wild populations. Because Lake Superior is the coldest and deepest of the Great Lakes, it provides the ideal cold-water habitat these fish require to thrive. Anglers typically target them during the late summer and autumn months when they migrate toward the various river mouths—such as the St. Marys River or the Brule River—for their spawning runs. While the populations are not as massive as those in Lake Michigan, the salmon in Lake Superior are highly prized for their hard-fighting nature and the pristine, mercury-low environment of the Big Lake.