The McNeil River is a river on the eastern drainage of the Alaska Peninsula near its base and conjunction with the Alaska mainland. The McNeil emerges from glaciers and alpine lakes in the mountains of the Aleutian Range. The river's destination is the Cook Inlet in Alaska's southwest. The McNeil is the prime habitat of numerous animals, but it is famous for its salmon and brown bears. This wealth of wildlife was one of the reasons for the Alaska State Legislature's decision to designate the McNeil River a wildlife sanctuary in 1967. In 1993, this protected area was enlarged to preserve an area that has the highest concentration of brown bears anywhere in the world. According to the Alaska Department of Fish and Game, up to 144 brown bears have been sighted on the river in a single summer with 74 bears congregating in one place at a time! Its entire length of 35 miles (55 km) lies within the McNeil River State Game Sanctuary, created in 1967 by the State of Alaska to protect the numerous Alaska brown bears who frequented the area. It also lies entirely within the Kenai Peninsula Borough boundaries.