Katmai is home to one of the largest populations of protected brown bears in the world. They’re also the largest brown bears, with adult males weighing over 1,000 pounds by fall.

As the images above and below show, this atypical family group was seen in various parts of Katmai's Brooks River area — an extremely popular fishing spot for these Katmai bears.

Welcome to Fat Bear Week 2023! Katmai National Park and Preserve’s brown bears spent the summer gorging on 4,500-calorie salmon, and they've transformed into rotund giants, some over 1,000 pounds.

From mango-loving sloth bears to wild black bears with 23 cubs, discover the oldest bears ever known and what made them ...

Fat Bear Week graces the social media feeds of hundreds of thousands of fans with images and videos of the park’s fluffy carnivores. But Hernandez said the week also celebrates Katmai's robust ...

Since 2012, millions of viewers have tuned in to Explore.org’s bear cams of Alaska’s Katmai National Park and Preserve, and many of them can tell you that bear 480 Otis is a legend. Otis has ...

compare photos. This image provided ... In this photo provided by the National Park Service is Grazer, the winner of the 2023 Fat Bear Contest, at Katmai National Park, Alaska on Sept. 14, 2023.

Fat Bear Week 2022: It's time to vote. The 2021 winner of the contest was 480 Otis, a portly veteran who has dominated the scene with wins in 2014, 2016 and 2017.

Spring is for skinny bears and March Madness basketball. Fall, however, is for fat bears -- and for Katmai National Park & Preserve's annual Fat Bear Week and its accompanying tournament of ...

Fall is for fat bears – and for Katmai National Park & Preserve’s annual Fat Bear Week and its accompanying tournament of crowning a chubby champion for 2022. Online voting by the public ...

Spring is for skinny bears and March Madness basketball. Fall, however, is for fat bears -- and for Katmai National Park & Preserve's annual Fat Bear Week and its accompanying tournament of ...

Spring is for skinny bears and March Madness basketball. Fall, however, is for fat bears -- and for Katmai National Park & Preserve's annual Fat Bear Week and its accompanying tournament of ...