Since 2014, Katmai National Park (katmainpp) has hosted a March madness–style competition inviting the public to vote on their favorite bear from 12 of the park’s most robust residents. This year, the Fat Bear Week tournament and voting will take place September 23–30, and the champion will be crowned on September 30. Fast Company writer Grace Snelling breaks down what to know about the #FatBearWeek competition, how to watch the bears, and where to cast your ballot.