Fat Bear Week is back in Alaska’s Katmai National Park as behemoth brown bears pack on the pounds ahead of hibernation season. The 12 contestants will face off in a single-elimination, bracket-style tournament to see who will be named the fattest of them all in the wildly popular online voting contest called Fat Bear Week. | NBC News

660K views · 10K reactions | Willy's video from the Brooks River, Katmai National Park, taken yesterday on our first Brooks Camp trip of the year. We still have a few seats open for Brooks Camp and other trips to Katmai National Park for July. | Kodiak Island Expeditions | Facebook

1.3M views · 17K reactions | Most bad to the bone old grizzly in the valley. Captured in Katmai National Park on tour with Scott Stone Photography | John Derting | Facebook