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Naknek Lake
Brown bear Brooks Camp.jpg
A grizzly bear in Naknek Lake, with Iliuk Moraine and Iliuk Arm Naknek Lake in the background
Location Lake and Peninsula Borough and Bristol Bay Borough, Alaska
Primary outflows Naknek River
Basin countries United States
Max. length 64 km (40 mi)
Max. width 13 km (8.1 mi)
Surface area 150,000 acres (61,000 ha)

Naknek Lake is a lake in southern Alaska, near the base of the Alaska Peninsula. Located in Katmai National Park and Preserve, the lake is 40 miles (64 km) long and three to eight miles (4.8 to 12.9 km) wide, the largest lake in the park. The lake drains west into Bristol Bay through the Naknek River. The elevation of the lake has lowered over the past 5,000 years as it has cut through a glacial moraine, separating Naknek Lake and Brooks Lake and creating Brooks Falls about 3500 years ago.

Location of King Salmon, Alaska

The earliest Russian explorer reported the lake's name as Naknek, but a later one said its name was "Akulogak". Ivan Petrof named the lake Lake Walker, for Francis Amasa Walker, Superintendent of the 1880 United States census.

The lake is famous for its sport fishing, supporting one of the largest king salmon fisheries in southwestern Alaska, though the king salmon are greatly outnumbered by sockeye salmon as well as pink and chum salmon. Large rainbow trout are also common around the lake, along with northern pike, lake trout and Arctic char. Brooks Camp is located on the lake's shore where the Brooks River enters the lake over rapids.


Grizzly mama bear with spring cubs. Naknek Lake, Katmai National Park, Alaska
A mother grizzly bear with four cubs on the edge of Naknek Lake

Naknek Lake harbors a wide variety of life, typical of the Alaska Peninsula. Typically observed around the lake are moose, wolves, and occasionally wolverines. However, the lake is most famous for sockeye salmon and grizzly bears. The bears are often seen wandering around the lake or wading into it to catch fish, but they are found in the greatest abundances at Brooks Camp. Bears are seen frequently at Brooks Falls, catching salmon there; they are the main attraction to the lake and Brooks Falls and Camp.

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