The competition in 2019’s Fat Bear Week is particularly heated

Meet the heavyweights.
 By 
Mark Kaufman
 on 
Original image replaced with Mashable logo
Original image has been replaced. Credit: Mashable

It's the happiest time of the year — Fat Bear Week! This year's event takes place from Sept. 23-30, and Mashable will be following all the ursine activity. Katmai National Park and Preserve’s brown bears (also known as grizzly bears) spent the summer gorging on 4,500-calorie salmon, and they've transformed into rotund giants, some weighing more than 1,000 pounds. So, the Alaskan park is once again hosting its beloved annual competition to crown the fattest of the fat bears.


Welcome to Fat Bear Week 2019! Katmai National Park's bears spent the summer gorging on 4,500-calorie salmon, and they've transformed into rotund giants, some over 1,000 pounds. The park is holding its annual playoff-like competition for the fattest of the fat bears (you can vote online between Oct. 2 and Oct. 8), and Mashable will be following the ursine activity.


Every bear is a winner.

They endure harsh, brutal lives, months of famine (hibernation), violent fights, and incessant threats by competitors.


You May Also Like

Yet, at the conclusion of Fat Bear Week, there must be a single champion. The annual online competition, while certainly fun, is a valuable way for us to appreciate the perseverance of wild animals that still live wild lives in Alaska's untrammeled, undeveloped (for now, anyway) wilderness, a land teeming with wolverines, lynx, salmon, and bald eagles.

Katmai's bears, home to one of the densest concentration of bears on Earth, appeared on the explore.org webcams in June as relatively skinny, sometimes gaunt looking, animals. But by September, the brown bears put on hundreds of pounds — some with bellies that nearly scrape the ground.

"It's been amazing to once again watch the bears' transformation from lean animals to the roly-poly giants they have become," marveled Mike Fitz, a former park ranger at Katmai National Park and currently a resident naturalist for explore.org.

There are 12 plump bears in the park's 2019 Fat Bear Week bracket. But this year, unlike many years, there are a number of top, formidable contenders.

Original image replaced with Mashable logo
Original image has been replaced. Credit: Mashable

"In some years, there's clearly one or two fattest bears in the Fat Bear Week tournament, but that's not the case this year," said Fitz.

Fitz, who spent much of the summer observing these bears, noted four true heavyweight challengers this year. Who are they?

(Just a note: Images below are not the park's official 2019 Fat Bear Week images, which Katmai will release throughout the week to inform your voting. This is accomplished by "liking" the bear pictures on Facebook.)

Chunk and 747

These big bruisers are in the prime of their lives. They are two of the most dominant bears at Katmai's salmon-clogged Brooks River, and are able to position themselves at the most opportune fishing spots. The bears can devour dozens of fish over the course of a few hours.

"Chunk and 747, in particular, likely weigh well over 1000 pounds and perhaps more than 1200," noted Fitz. "They've been able to use their size and disposition to consistently gain access to their most preferred fishing spots at Brooks Falls."

Bear 747

Original image replaced with Mashable logo
Original image has been replaced. Credit: Mashable

Bear 32 "Chunk"

Original image replaced with Mashable logo
Original image has been replaced. Credit: Mashable

Both 747 and Chunk's great fat reserves will be essential even next year, when they awake after a six-month-long hibernation. "After emerging from hibernation next spring, they'll need their fat reserves to fuel their pursuit of mating opportunities during a time of year with relatively little high-calorie food," said Fitz.

Holly and Grazer

These impressive bears both raised cubs last year. But this year they roamed the river without any needy offspring to feed.

"Without the energetic burden of raising cubs this year, Holly and Grazer have been able to devote all their efforts to their own body size," noted Fitz.

"Holly and Grazer are smaller overall compared to the big adult males, but they may be even proportionally fatter than Chunk and 747," he added. "Holly and Grazer might give birth this winter, so they'll need their fat to not only support their own survival but also that of any cubs." 

Bear 435 "Holly"

Original image replaced with Mashable logo
Original image has been replaced. Credit: Mashable

Bear 128 "Grazer"

Original image replaced with Mashable logo
Original image has been replaced. Credit: Mashable

One notable omission from this year's Fat Bear Week bracket is Bear 409, or "Beadnose," who was last year's glorious champion.

Mashable will explore her disappearance in a forthcoming story. But even with 409's conspicuous absence, the competition is heavy.

Topics Animals

Mashable Image
Mark Kaufman
Science Editor

Mark was the science editor at Mashable. After working as a ranger with the National Park Service, he started a reporting career after seeing the extraordinary value in educating people about the happenings on Earth, and beyond.

He's descended 2,500 feet into the ocean depths in search of the sixgill shark, ventured into the halls of top R&D laboratories, and interviewed some of the most fascinating scientists in the world.

Mashable Potato

More from Fat Bear Week!
This is the fattest bear
Original image replaced with Mashable logo

Why the reigning fat bear champion isn't in the contest this year
Original image replaced with Mashable logo

All hail Chunk, the winner of Fat Bear Week (and our hearts)
a very fat bear searchers for salmon in alaskan river

It's Fat Bear Week! How to watch the livestreams and vote for your favorite chonks.
a very fat grizzly bear photographed in alaska for fat bear week 2025


Recommended For You
Connor Storrie shares a surprising 'Heated Rivalry' story in Seth Meyers interview
Seth Meyers interviews Connor Storrie on "Late Night."

'Heated Rivalry's Hudson Williams teases Season 2, explains 'c*ck sock' to Fallon
Hudson Williams and Jimmy Fallon on all fours facing each other on 'The Tonight Show.'

'Heated Rivalry' star Connor Storrie embraces childhood YouTube videos as 'self-acceptance'
Connor Storrie announces SAG Awards nominations in Los Angeles

Connor Storrie, Hudson Williams, and Seventeen's Joshua are the Golden Globes' most viral meet-cute
A side-by-side image of Connor Storrie and Hudson Williams presenting at the Golden Globes and Joshua Hong on the red carpet

Harry Potter gets 'Heated Rivalry' treatment in 'SNL' sketch
Two wizards from harry potter riding a broom stick

More in Science
California just launched the country's largest public broadband network
Newsom stands behind a teen on a computer. A group of people cheer and clap behind them.

The Shark FlexStyle is our favorite Dyson Airwrap dupe, and it's $160 off at Amazon right now
The Shark FlexStyle Air Styling & Drying System against a colorful background.

Amazon's sister site is having a one-day sale, and this Bissell TurboClean deal is too good to skip
A woman using the Bissell TurboClean Cordless Hard Floor Cleaner Mop and Lightweight Wet/Dry Vacuum.

The best smartwatch you've never heard of is on sale for less than $50
Nothing CMF Watch 3 Pro in light green with blue and green abstract background

Reddit r/all takes another step into the grave
Reddit logo on phone screen

Trending on Mashable
NYT Connections hints today: Clues, answers for April 3, 2026
Connections game on a smartphone

Wordle today: Answer, hints for April 3, 2026
Wordle game on a smartphone


NYT Strands hints, answers for April 3, 2026
A game being played on a smartphone.

What's new to streaming this week? (April 3, 2026)
A composite of images from film and TV streaming this week.
The biggest stories of the day delivered to your inbox.
These newsletters may contain advertising, deals, or affiliate links. By clicking Subscribe, you confirm you are 16+ and agree to our Terms of Use and Privacy Policy.
Thanks for signing up. See you at your inbox!