Katmai National Park

Katmai National Park

Katmai National Park and Preserve, in southern Alaska, is home to the greatest concentration of grizzly bears in the world. Katmai is the place made famous by the documentary film "Grizzly Man," on the strange life and death of Timothy Treadwell, a bear lover who lived with bears in the wild until one took his life.

Grizzly bears are the largest land predators on Earth – topping 1,000 pounds and standing as tall as 10 feet. Alaskans refer to the bears in Katmai that live near the water, and have learned to make use of marine resources, like salmon and clams, as brown bears. Bears that remain 100 miles or more inland are refered to as Grizzlies.

Journey Into Bears

ABC News Producer Michael Harris traveled to Katmai National Park for "GMA" Weekend's "Weekend Window" series. Here's his account of the trip: I prepped for the shoot at Katmai by calling a colleague at National Geographic Channel, veteran filmmaker Mark Emery, who's been shooting in Alaska for some 30 years.