Who’s the fattest of them all? Get to know the fat, hairy bears of Fat Bear Week 2018

This year, 13 fat bears compete in the fall competition.
 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 at Mashable! Each fall, Katmai National Park holds a competition as Alaska’s brown bears finish fattening up for their long winter hibernation. This year, Mashable is getting in on the salmon-munching action. Check back with us all week as we follow the fat bear face-offs each day, and remember to get your votes in for each round. Happy fishing!


By the fall of each year, the brown bears of Katmai National Park grow exceptionally fat. The largest males, in fact, can tip the scales at more than 1,000 pounds.

This year, 13 plump omnivores have made it into the official Fat Bear Week contest, after park rangers selected the bulkiest contenders.

Over the next month, the bears will begin hibernating, slowly burning through their ample fat stores while slumbering through the harsh Alaskan winter.

Before their hibernation can begin, however, we -- their adoring public -- must pick our champion: the fattest fat bear of them all.

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

Katmai has released its bracket of fattest bears, and voting begins on Wednesday. But first, it's time to get to know the bears of 2018's competition.

The bracket is populated with some globally popular characters -- such as Holly, Otis, and 747 -- bears who have earned their fame while fishing on the explore.org live webcams.

Typically, there are 12 bears for the 12 playoff spots. But 2018 isn't your average fat bear bracket.

The twelfth spot is shared by two sibling cubs who just spent their second year in the wild, munching salmon along Katmai National Park's Brooks River.

To help you cast informed votes, each day both Mashable and Katmai National Park will post "dueling" comparison images of each bear -- from their early summer state to their present, rotund forms -- so you can judge just how fat they've gotten this summer while devouring the skin, brains, and vivid red flesh of sockeye salmon.

The voting is ultimately done through Katmai's Facebook page, but before you cast your ballot, it's time to do a little research:

Your 2018 Fat Bear Week Competitors

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

In 2014, Holly adopted an orphaned cub that had been abandoned in Katmai.

This year, she returns with two yearling cubs -- cubs that already survived their first year in the wild and are back for a second summer and have their own shared spot on the bracket.

Holly's adopted cub, Bear 503, is now a young adult that's facing off in this year's Fat Bear Week competition.

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

Topics Animals

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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.

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More from Fat Bear Week!
Bear hibernation is a superpower, but it comes with a cost
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Day 3 of Fat Bear Week features a big showdown between two former champs
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Fictional bears, ranked
By Proma Khosla and Kellen Beck
Original image replaced with Mashable logo

A famous matriarch bear is missing from Fat Bear Week. Where could she be?
Original image replaced with Mashable logo

Day 2 of Fat Bear Week pits a scarred, powerful male against a young challenger
Original image replaced with Mashable logo

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