Fat Bear Week is back, bringing attention to some of the largest and most impressive brown bears as they prepare for winter in Alaska’s Katmai National Park.

Each year, the popular wildlife event celebrates bears that have spent months feeding and building up fat reserves to survive the winter hibernation period. Fans around the world follow the competition to see which bear has transformed the most during the summer season.

Bears Compete for the Title of Fattest Bear

The competition highlights the remarkable ability of brown bears to consume enormous amounts of food during the warmer months. Salmon swimming upstream provide a major source of nutrition, allowing the animals to gain substantial weight before winter arrives.

Participants are evaluated by the public, who vote for their favorite bear based on its size, appearance and seasonal transformation. The contest is designed to celebrate the bears’ natural survival strategies rather than simply identify the largest animal.

Some bears return to the competition year after year, building loyal followings among wildlife enthusiasts. Their changing appearances offer viewers a glimpse into the annual cycle of feeding, survival and hibernation.

A Celebration of Wildlife and Conservation

Beyond the playful competition, Fat Bear Week draws attention to the importance of protecting Alaska’s ecosystems and the habitats that support its bear populations.

The event has become a popular way to connect people with wildlife conservation, helping audiences understand the challenges bears face and the role of healthy natural environments in their survival.

As voting begins, fans are once again asking the same question: Which bear has put on the most weight and will claim this year’s Fat Bear Week title?