A live webcam has been following their fishing expeditions as they beef up for a winter of hibernation to come.
VIDEO: Tennessee man shooing Gatlinburg bear from car
VIDEO: TN man shoos bear from car in Gatlinburg
Brooks Falls in the remote area of Alaska's southern peninsula provides the perfect natural roadblock for the hungry bears to wait for a juicy meal -- migrations of fresh, 4,500-calorie sockeye salmon that are making the journey upstream to lay their eggs.
Click here to watch the bears at work and open the portal for the Explore.org network of live cameras.