The Hoh Rainforest is a protected temperate rainforest within Olympic National Park on Washington’s Olympic Peninsula and the ancestral home of the Hoh people. Covering about 24 square miles along the Hoh River, its glacier-shaped valley and exceptionally wet climate create cool, saturated conditions that sustain dense old-growth forest, heavy moss and lichen growth, and lush ferns. Sitka spruce and western hemlock dominate, joined by several other tree species, while wildlife includes Roosevelt elk, Olympic black bear, northern spotted owl, and banana slugs. Spared commercial logging inside the park, the rainforest is a major destination whose access was restored in May 2025 after flood damage to Upper Hoh Road.