Ricketts Glen State Park - Pennsylvania - USA Ricketts Glen State park offers hiking, camping, horseback riding, and hunting. Lake Jean is used for swimming, fishing, canoeing and kayaking. In winter there is cross-country skiing, ice fishing on the lake, and ice climbing on the frozen falls. The Glens Area has 22 named waterfalls. The park has four rock formations from the Devonian and Carboniferous periods, and is home to a wide variety of plants and animals. It was named an Important Bird Area by the Pennsylvania Audubon Society and is an Important Mammal Area too. Ricketts Glen State Park was chosen by the Pennsylvania Department of Conservation and Natural Resources as one of the "Must-See Pennsylvania State Parks"