Sixteen brown bears, including defending champion Chunk, compete in Katmai National Park's Fat Bear Week voting from September 22 to 29ScienceSep 18 at 5:13 PM – Sep 18 at 8:37 PM3 outletsUnited StatesNPRAlaska's salmon-feasting bears face off in biggest Fat Bear Week ever Sep 18 at 5:13 PMUSA TodayFat Bear Week participants revealed. See list of fattest bears seen Sep 18 at 8:37 PMKING 5Fat Bear Week 2026 bracket: Chunk defends his crown against 15 salmon-stuffed rivals Sep 18 at 7:21 PM