Brown bears and moose live throughout the coastal and lake regions of Katmai National Park and Preserve. The moose feed on willows, water plants, and grasses. Other mammals include caribou, red fox, wolf, lynx, wolverine, river otter, mink, marten, weasel, porcupine, snowshoe hare, red squirrel, and beaver. Along the coast are sea lions, sea otters, and hair seals, porpoise, with beluga, killer, and gray whales sometimes using the Shelikof Strait.

For a draft list of mammals compiled by the Southwest Alaska Network inventory and monitoring program click here.