Willow Creek State Rec Area

140 sites. The broad Susitna river Valley, including what is now the recreation area, was scoured by massive glaciers, which once covered it. When the ice retreated some 9,000 years ago, it left a rolling landscape of elongated glacial deposits, called drumlins, dotted with hundreds of lakes and ponds. The recreation area an ideal habitat for many mammals and birds. Perhaps most noticeable to the summer visitor are water dwellers, especially beaver and waterfowl. These animals are vital to maintaining crucial water levels in the ecosystem; their dams and lodges must not be disturbed.