Originally Posted by http://www.baldeagleinfo.com/eagle/eagle1.html

Bald eagles can be found in every state except Hawaii. They are more prevalent in Florida, Wisconsin, Washington, Minnesota, Oregon, and Michigan, but the largest concentration is in Alaska.
For people seeking to see bald eagles in large numbers, the greatest concentration occurs in mid October through December on the Chilkat river near Haines, Alaska. The salmon run attracts three to four thousand bald eagles, which gather along a four mile stretch of the river located in the 48,000 acre Alaska Chilkat Eagle Preserve. There's a concentration of 200,000 to 500,000 chum salmon on the Chilkat late in the year. Even when the salmon aren't running, the Haines area is a good place to see eagles. Alaska is a long way to go for someone who would just like to see bald eagles. Probably the best alternative is the Northern Mississippi valley during January and February. As many as five thousand bald eagles winter on the river between Cairo, Illinois and St. Paul, Minnesota, tending to concentrate near several large dams.
Several communities host bald eagle festivals. During the month of January, one can attend the Quad Cities Bald Eagle Days, the Dubuque Bald Eagle Watch in Dubuque, Iowa, the Keokuk Bald Eagle Days in Keokuk, Iowa, and the Muscatine Bald Eagle Watch in Muscatine, Iowa. For those who go south in the winter, Emory, Texas hosts January Eagle Fest with a juried art exhibit and barge tours of lakes where eagles gather.
From mid November through mid February thousands of bald eagles gather along the Squamish, Mamquam and Cheakamus rivers near Brackendale and Squamish, British Columbia to feast on spawning salmon. Brackendale and Squamish are located about 45 minutes north of Vancouver on Hwy 99.