A waterfall in Olympic National Park, Washington, United States

Moss and mist. Olympic National Park, Washington, United States

Olympic National Park covers a rare mix of terrain—and that's part of its unique appeal. Alpine ridges, quiet forests and one of the longest stretches of undeveloped coastline in the lower 48 of the United States all meet here. Spanning more than 3,600 square kilometres in Washington State, United States, this UNESCO World Heritage Site drew over 3.7 million visitors in 2024. Originally protected in 1909 as Mount Olympus National Monument by President Theodore Roosevelt, the area became a national park in 1938.

Rain isn't a problem here—it's the reason this moss-draped area exists. On the western edge of the park, the Hoh Rainforest receives about 3,300 mm of rain a year and it wears every drop proudly. Towering Sitka spruces, western red cedars and coast Douglas firs line trails like the Hall of Mosses, while banana slugs, bobcats and Olympic black bears call the forest home. The Hoh is one of the best-preserved temperate rainforests in the world. And if you're chasing waterfalls, Sol Duc Falls delivers—three streams plunging into a narrow, mossy gorge. Olympic is a solid reminder that the best hikes don't always come with clear skies.