Vote to crown the fattest of them all during Fat Bear Week, Sept. 29-Oct. 5; vote for Fat Bear Junior today

Fat Bear Week champion from 2020 (National Park Service photo)

Park rangers at Alaska's Katmai National Park and Preserve are gearing up for this year's Fat Bear Week, which goes Sept. 29 through Oct. 6.

They'll create a March Madness-style bracket pitting individual bears against each other, then the public votes to see who advances to the next round until one bear is crowned the fattest of them all. The annual contest is meant to celebrate Katmai's healthy ecosystem, since fat equals winter survival for bears. Last year the contest received more than 640,000 votes.

"In addition to voting during this week-long tournament, there will be a series of online chats on explore.org featuring Mike Fitz, explore.org's resident naturalist, and rangers from Katmai to learn more about the individual bears and Katmai's healthy ecosystem," according to the event website. "Throughout the season, you can also tune in to the explore.org bear cams which offer unprecedented access to the lives the bears of Brooks River. There are also special live events on a variety of topics hosted weekly as well."

And, there's a new wrinkle this year: the Fat Bear Junior competition. Voting began Sept. 23, but you can still vote today until 9 p.m. ET. We're rooting for the admirably chunky 132's Spring Cub.

Click here for more information or to vote.