|The Hoh Rainforest is located on the Olympic Peninsula in western Washington state, USA. It is one of the few temperate rainforests in the U.S., and also one of the largest. Within Olympic National Park, the forest is protected from commercial exploitation. This includes 24 miles of low elevation forest (394 to 2,493 feet) along the Hoh River. It was formed thousands of years ago by glaciers. Between the park boundary and the Pacific Ocean, (30 miles) of river, nearly all of the forest has been logged within the last century.