During the summer season, as the Chum Salmon run peaks, a large number of brown bears gather at the McNeil River to feast. It is these calico-colored chum (or dog salmon) that attracts these bears in early July through mid-August to the remote Southwest Alaskan shore. The falls are located about a mile upstream from its mouth where a series of rocks and boulders form the McNeil River Falls. Salmon are slowed in their movements by the falls and they congregate there during their upstream migration to their spawning grounds. Since there are only a handful of rivers in the area with fish, bears congregate at McNeil River Falls in numbers that have brought McNeil River worldwide fame. I was fortunate enough to get a permit. The site of those large bears, some well over 1,000 pounds, at McNeil River Falls is extraordinary.
"Feast Time" from Katmai National Park from 2006.