While there are three temperate rainforests inside the boundaries of Olympic National Park (Hoh, Quinault, and Queets), the most popular and well-known is the Hoh Rainforest. In addition to its notoriety, the Hoh Rainforest is also the only one of the three to be named a World Heritage Site and a Biosphere Reserve by UNESCO. Before it received this type of recognition, however, the Hoh itself was one of the main reasons for establishing Olympic National Park, as the park itself was created to preserve “the finest example of primeval forest…”. Located on the slopes of the western slopes of the Olympic Mountains, the Hoh is also a spot that receives a great deal of precipitation, averaging over fourteen feet of rain per year. All of this rain has encouraged the growth of tall stands of sitka spruces and western hemlocks, and many other plants throughout the forest. While there are many trails that explore the Hoh Rainforest, the easiest and most accessible introduction to the region is the Hall of Mosses trail.