A famous matriarch bear is missing from Fat Bear Week. Where could she be?

Welcome toFat Bear Weekat Mashable! Each fall, Katmai National Park holds a competition as Alaska’s brown bears finish fattening up for their long winter hibernation. This year, Mashable is getting in on the salmon-munching action. Check back with us all week as we follow the fat bear face-offs each day, and remember to get your votes in for each round. Happy fishing!A top competitor is missing from this year's Fat Bear Week contest. For a fleeting moment in June, rangers spotted Bear 410