The Hoh Rain Forest

The temperate rainforests of Washington's Olympic Peninsula receive between 12 and 14 feet of rainfall per year, making them the wettest region in the contiguous United States. The Hoh Rain Forest in Olympic National Park contains trees over 300 feet tall and fallen logs blanketed in so many layers of moss, fern, and lichen that they look like green furniture. The rainforest exists because Olympic Peninsula mountains trap moisture from Pacific storms before it can reach the drier interior. Just 50 miles east of the wettest spot in the region, in the rain shadow of the Olympics, some areas receive less than 20 inches of rain per year.

Source: National Park Service