Katmai National Park (Brooks Falls)

Katmai National Park and Preserve protects 4 million acres of remote wilderness on the Alaska Peninsula, centered on the volcanic Valley of Ten Thousand Smokes (legacy of the 1912 Novarupta eruption, one of the 20th century’s largest volcanic events) and the world-famous Brooks River, where Brooks Falls draws one of the most spectacular wildlife congregations on Earth.

Each July, dozens of brown bears gather at Brooks Falls — a modest 6-foot waterfall on the Brooks River — to catch sockeye salmon leaping upstream in mid-air. The viewing platforms overlook the falls at close range, and the spectacle of 20-30 massive bears crowding the falls, batting and catching salmon, is unequaled anywhere on Earth. Broadcast live via the Brooks Falls bear cams to millions of viewers worldwide, it is one of the most iconic images of wild Alaska. Remote, wild and extraordinary, Katmai is a treasured natural icon of Alaska.

Katmai offers the Brooks Falls bear viewing (the singular world-class experience — the viewing platforms at Brooks Falls provide close, safe views of dozens of brown bears catching sockeye salmon in mid-air during July’s peak run; the Brooks Camp area also has a beach platform for general bear watching); hiking and backpacking in the backcountry; fishing the Brooks and other rivers (rainbow trout and grayling are abundant, and salmon are present throughout the season); kayaking and canoeing; and visiting the Valley of Ten Thousand Smokes (a moonscape of volcanic ash and fumaroles from the 1912 eruption, accessible by a bus tour from Brooks Camp). Bear watching at Brooks Falls, fishing, and the Valley of Ten Thousand Smokes are the signature draws.

July is the peak of the Brooks Falls bear-watching season — the sockeye salmon run is at its height, the bears are at maximum concentration on the falls, and the ‘Fat Bear Week’ hyperphagia begins; the platforms can be crowded and waiting times apply. Early July brings the biggest salmon numbers; late July and August see continued bear activity as the run progresses. September brings a second run (silver salmon) and the fall hyperphagia, when the bears are gorging intensely before winter and are often spectacularly fat. June is quieter and good for fishing. July for the peak bear spectacle and September for the fall hyperphagia are the highlights — book well in advance (the park is fly-in only and spaces are limited).

The Alaska Peninsula is the homeland of the Alutiiq/Sugpiaq people, who lived along its rivers and coasts for millennia and fished the same salmon runs the bears use today. In June 1912, the Novarupta volcano erupted in a cataclysmic explosion — the largest volcanic eruption in the 20th century — burying the Valley of Ten Thousand Smokes in up to 700 feet of ash and pumice and dramatically altering the landscape. Naturalist Robert Griggs explored the area in 1916 and named the valley, leading to the area’s protection as a national monument that same year and eventual designation as a national park in 1980. The bear-watching culture at Brooks Falls developed in the latter 20th century and has made Katmai world-famous. Katmai preserves this volcanic legacy and the extraordinary salmon-bear ecosystem.

Katmai’s geology is dominated by the 1912 Novarupta eruption — the largest volcanic eruption in the 20th century, which ejected 3 cubic miles of magma and buried the Valley of Ten Thousand Smokes in a pyroclastic flow deposit of ash and pumice up to 700 feet deep. The eruption was so powerful that it caused the summit of nearby Mount Katmai to collapse, forming a dramatic 4-mile-wide caldera (now filled with a turquoise crater lake). The Alaska Peninsula’s volcanic arc (part of the Pacific Ring of Fire) continues to be active, with multiple volcanoes in the park. The Brooks River flows across glacial outwash into Naknek Lake; the sockeye salmon pass through Naknek Lake and up the Brooks River, where Brooks Falls is the crucial barrier that creates the bear-watching spectacle.

Brooks Falls and Katmai are defined by the brown bear — the park supports one of the highest densities of brown bears in the world (over 2,200 bears in the park), and the Brooks River area can host 40 or more bears simultaneously during the July peak. The bears are habituated to people (but wild — maintain all required distances) and often observable at remarkably close range from the viewing platforms. Beyond bears, the park supports wolves, moose, caribou, river otters, Steller’s jays, eagles, and a rich birdlife; the Shelikof Strait coast has seabirds and marine mammals; the rivers support five species of Pacific salmon and trophy rainbow trout.

Katmai’s Brooks River ecosystem is a textbook example of the keystone role of salmon in the subarctic ecosystem — the sockeye salmon run fertilizes the entire watershed with marine nutrients (the carcasses of salmon eaten by bears, eagles and other predators decompose and feed the forest), sustaining the bears, the eagles, the rainbow trout and ultimately the vegetation. The 1912 eruption created a post-volcanic succession laboratory in the Valley of Ten Thousand Smokes (the ash-covered landscape is slowly being recolonized by life). Protecting the salmon runs, the bears, the river and the volcanic legacy sustains both the ecology and the spectacle of Katmai.

Katmai National Park holds a treasured place among the wildlife icons of the world — the site of the greatest brown bear concentration on Earth, where dozens of massive bears catch leaping salmon at Brooks Falls; the legacy of the 1912 Novarupta eruption and the Valley of Ten Thousand Smokes; and the homeland of the Alutiiq/Sugpiaq people. The Brooks Falls bear cams have made Katmai one of the most watched wildlife spectacles in the world, and ‘Fat Bear Week’ (when fans vote for the year’s fattest bear) has become a beloved global event. Katmai is a cherished natural icon of Alaska and the world.

Katmai National Park is on the Alaska Peninsula, accessible only by small plane (no roads). Most visitors fly from Anchorage to King Salmon (commercial flights) and then take a floatplane or charter to Brooks Camp (30-minute floatplane from King Salmon to Naknek Lake). Brooks Camp has a lodge, campground, and the bear-viewing platforms. Daily visitor limits and advance permit reservations are required for Brooks Camp and the bear-viewing platforms during peak season. The Valley of Ten Thousand Smokes bus tour departs from Brooks Camp. There is no entrance fee, but transportation, lodging and permit fees apply. Check the National Park Service for permit availability, lodging and current conditions well in advance.

The National Park Service manages Katmai’s wilderness and wildlife. The brown bears at Brooks Falls are the park’s most critical conservation feature; visitors help by maintaining all required distances (the park enforces strict rules — bears always have right of way on trails), never feeding bears, respecting all platform rules, packing out everything, storing food in bear-resistant containers, and supporting the park’s educational mission. The salmon runs are essential to the entire ecosystem; any threat to the salmon (fishing pressure, habitat degradation, climate-driven changes) threatens the bears. Protecting the salmon, the bears and the Brooks River ecosystem sustains both the ecology and the spectacle.

Brooks Camp is active brown bear habitat — bears are wild and large (adult males can exceed 1,000 pounds) and have right of way on all trails; follow all park ranger instructions precisely, maintain required distances at all times (no exceptions), and treat the camp’s food storage and bear-safe rules as absolute. Never approach a bear, block its path, or linger between a bear and the river. The floatplane access means the park is remote; carry appropriate clothing for cold and wet subarctic conditions. Bear spray should be carried by all backcountry travelers. Respect the bears, the remote location, the floatplane travel and the weather.

Brooks Camp and bear-viewing platforms require advance permit reservations (book through recreation.gov — they fill quickly, especially for July). Daily visitor limits apply. Bears always have right of way — yield on all trails; follow ranger instructions. Never approach or feed bears; maintain all required distances. Store all food, trash and scented items in the bear-proof storage facilities provided. No entrance fee, but transportation, lodge and permit fees apply. Fishing requires an Alaska license (check regulations for the Brooks River — the platform stretch may be restricted). Pack out all trash. Drones are prohibited. Check the National Park Service for permits, rules and current conditions before planning a trip.

The town of King Salmon (the commercial-flight hub for access to Katmai, with a small airport and basic services), Naknek Lake and the other lakes of the Naknek drainage, the Valley of Ten Thousand Smokes (a day-trip bus tour from Brooks Camp), the Alaska Peninsula National Wildlife Refuge (adjacent to Katmai), and the Bristol Bay salmon fishery (the world’s largest sockeye salmon fishery) define the region. Katmai is the crown of a Bristol Bay and Alaska Peninsula wilderness experience, and the Brooks Falls bear watching is one of the most extraordinary wildlife events accessible to visitors anywhere on Earth.

Book your Brooks Camp permit and lodging or campground reservation on recreation.gov the moment the reservation window opens (typically in January for the following summer) — July dates fill within hours and the July peak is the non-negotiable target for the best bear viewing. Watch the Brooks Falls live camera (available via the Explore.org website) before your trip to understand the rhythm of bear activity and identify individual bears by their markings. At the falls, patience on the viewing platform rewards you — the mid-day hours when bears are actively fishing are the most dramatic; a single day at the falls watching a dominant male catch salmon after salmon in mid-air is an experience that is impossible to forget. Vote in Fat Bear Week in October as a consolation if you can’t make the July trip.