Fat Bear Week 2026 Round 1 Updates: Defending Champion Chunk Ousted and Technical Glitches Shake Up the Bracket

The annual celebration of ursine gluttony and ecological resilience, Fat Bear Week, has returned to Katmai National Park and Preserve in Alaska, drawing millions of online spectators worldwide to witness the dramatic transformation of brown bears preparing for winter dormancy. The 2026 tournament, hosted collaboratively by explore.org, the National Park Service, and the Katmai Conservancy, quickly escalated from a lighthearted conservation event into a high-stakes competition marked by record-breaking web traffic, technical hurdles, and early upsets that shattered expectations across the global fan base.

As the tournament advanced through its opening rounds, voters faced difficult choices between venerable Brooks River veterans and resilient subadults. The competition underscored not only the biological triumphs of individual animals navigating a shifting Alaskan ecosystem, but also the expanding cultural footprint of citizen science and wildlife observation in the digital age.

Early Upsets and Bracket Shakes

The opening stages of Fat Bear Week 2026 proved that past glory offers no immunity in the fierce democracy of online voting. By the conclusion of Round 1, Part 2, the tournament had lost its reigning champion. Bear #32, affectionately known as Chunk, was decisively knocked out of contention by Bear #164, widely recognized as Bucky Dent. Chunk, the 2025 champion who had spent much of the summer out of the public eye before re-emerging in remarkably robust condition, could not withstand the rising popularity of his younger, highly innovative opponent.

Meanwhile, veteran competitor Bear #151 (Walker), celebrated for his dominant presence and formidable stature along the river, successfully defeated Bear #903 (Gully) to advance to the next phase of the tournament. The lower bracket saw similar shifts, as younger generations of Katmai brown bears made their presence felt. In the subadult division, Bear #89 (Backpack) advanced past his competitors, while Bear #620—a member of Katmai’s famous "Brady Bunch" blended family—secured a victory that highlighted the complex social dynamics observed among brown bears in the region.

Technical Overloads and Schedule Revisions

The immense popularity of Fat Bear Week created unprecedented digital infrastructure challenges for organizers. Following a historic Day 1 turnout that overwhelmed the voting platform on explore.org, thousands of enthusiastic participants were temporarily locked out of casting their ballots. In response to the technical strain and to ensure fairness, organizers enacted emergency schedule adjustments.

Explore.org officials announced an extension of Round 1, Part 1 voting, pushing subsequent matchups back by 24 hours. Round 1, Part 2 commenced on Thursday, September 24, giving voters additional time to process the comprehensive fact cards and video footage provided by rangers before making their selections. The swift adaptation by organizers highlighted the logistical weight carried by the digital event, which has grown from a local park service experiment into a massive international phenomenon over the past decade.

Contender Profiles: The Heavyweights of Brooks River

The matchups in Round 1, Part 2 brought together a compelling mix of seasoned survivors and rising contenders, each with distinct survival strategies and life histories documented by park naturalists.

Bear #32 (Chunk) versus Bear #164 (Bucky Dent)
Chunk’s journey to the 2026 tournament was characterized by unpredictability. After taking the crown in 2025, the massive adult male made an unusually early appearance on the icy spring patches of Katmai in April before vanishing into the wilderness for the height of the summer salmon run. When he finally returned to the Brooks River cameras, his physique demonstrated his uncanny ability to capitalize on rich food sources. However, his historical rivalry with two-time champion Grazer—stemming from a 2024 altercation near the waterfalls—had already complicated his legacy among purists.

His opponent, Bucky Dent (Bear #164), represents a new era of ingenuity at Brooks Falls. First identified in 2019 with unknown lineage, the 7.5-year-old male previously struggled to secure prime fishing locations amidst intense competition from older bears. Rather than retreating, Bucky pioneered a novel fishing technique, positioning himself in the deepest plunge pool directly beneath the cascade of Brooks Falls to intercept salmon mid-air or sweeping upward from the depths—a method rarely, if ever, duplicated by other bears in the park. Now possessing the size to command his preferred territory, Bucky’s innovative pedigree proved irresistible to voters.

Bear #151 (Walker) versus Bear #903 (Gully)
Bear #151 (Walker) has long been a fixture of the Brooks River ecosystem, first cataloged by rangers in 2009 as an independent 2.5-year-old. Known historically for his relaxed, playful demeanor during his subadult years, Walker matured into an authoritative presence along the river. Despite years of consistent tournament appearances, the top honor had eluded him, often intercepted by legends such as Otis and Grazer. In 2026, Walker displayed heightened assertiveness, defending his position at the apex of the river hierarchy against younger challengers.

He squared off against Bear #903 (Gully), a 10.5-year-old offspring of Grazer. Gully gained internet notoriety in 2020 for a unique foraging habit: actively wading into flocks of gulls to snap up birds alongside his traditional salmon diet. This unconventional hunting style, combined with a towering build, propelled Gully into prime fishing acreage and cemented his status as a formidable tournament contender following his 2024 debut.

Subadult Showdowns: Resilience and Heritage

The tournament also spotlighted the next generation of Brooks River residents, whose early lives often reflect the harsh realities of wilderness survival.

Bear #694, a sociable 4.5-year-old male, faced off against Bear #620. While #694’s mother historically steered her litter away from the congested and competitive waters of Brooks Falls during his early years, he has increasingly tested the waters of the upper river while maintaining a preference for downstream riffles.

Bear #620 carries a unique pedigree as part of Katmai’s "Brady Bunch" family. In 2023, her mother (Bear #910) engaged in a rare cross-family adoption event by blending her brood with that of her sister (Bear #909), creating a cooperative rearing environment seldom documented among brown bears.

In a separate subadult bracket, Bear #610 competed against Bear #89 (Backpack). Bear #610, a remarkably small-statured female first identified in 2015 bearing a severe wound across her ribs, demonstrated extraordinary resilience by successfully raising her first known litter of cubs through a grueling summer season.

Her opponent, Backpack (Bear #89), is the 10.5-year-old son of 2019 champion Holly. Earning his moniker from a childhood habit of riding on his mother’s back during river crossings, Backpack survived a devastating leg injury as a yearling in 2017 that threatened his mobility and survival. Through maternal support and remarkable tenacity, he recovered to become a permanent fixture at the falls, relying on quiet dominance rather than overt aggression.

Conservation Impact and Community Support

Beyond the digital entertainment value, Fat Bear Week serves as a critical educational vehicle for the National Park Service, illustrating the ecological health of the Bristol Bay watershed, which supports one of the largest sockeye salmon runs on Earth. The abundant marine-derived nutrients provided by the salmon are essential for brown bears to build the thick fat layers required to survive months of winter hibernation in subterranean dens.

To further support the preservation of Katmai National Park and its wildlife, conservation organizations have leveraged the tournament’s massive reach for fundraising initiatives. The Katmai Conservancy operates the Otis Fund, named in honor of the legendary four-time champion Bear #480 (Otis), who passed away following the 2023 season. To bolster conservation efforts, explore.org committed to matching all donations made to the Otis Fund during the peak voting window, ensuring that the global enthusiasm surrounding the bears translates directly into long-term habitat protection and park operational support.

As voting continued through the week following the revised schedule, public attention remained fixed on explore.org to see which remaining titan would successfully navigate the bracket and claim the ultimate title of Fat Bear Week champion on Tuesday, September 29.