Olympic National Park is unlike any other in the national system — a place where within a single day of driving you can walk through a moss-draped temperate rainforest receiving 140 inches of rain per year, ascend to alpine meadows above the clouds, and photograph sea stacks on a wild Pacific coast backed by ancient spruce forest. UNESCO designated it a World Heritage Site in 1981 specifically because it is the largest protected area in the temperate world to encompass in one contiguous unit all ecosystems from ocean edge through temperate rainforest to alpine meadows and glaciated mountain peaks. There is nowhere else on Earth where this combination exists in a single park. The three ecosystems are not adjacent to each other — they are genuinely three different worlds, each requiring different gear, different timing, and a completely different photographic approach.

The park occupies the center of the Olympic Peninsula in northwestern Washington — a geographically isolated mass of mountains surrounded on three sides by water (the Pacific Ocean, the Strait of Juan de Fuca, and Puget Sound) that creates a unique precipitation dynamic. The Olympic Mountains intercept Pacific storm systems moving eastward, wringing extraordinary amounts of rain from the moist air on the western windward slopes. The Hoh Rainforest on the western side receives 12 to 14 feet of precipitation annually — making it the wettest location in the contiguous United States. The rain shadow on the eastern slopes creates entirely different conditions: the town of Sequim, just 30 miles from the Hoh, averages only 17 inches of rain per year. This rain shadow effect gives the park its extraordinary ecological range across a remarkably compact area.

The park also contains the longest undeveloped coastline in the contiguous United States — 73 miles of wilderness beaches where sea stacks rise from the surf, tide pools host extraordinary marine life, and ancient Sitka spruce forests grow down to the very edge of the waves. Roosevelt elk roam both the rainforest valleys and the coastal strip in significant numbers; the Hoh Rainforest valley holds one of the most important Roosevelt elk populations in North America. The Elwha River Restoration — the largest dam removal project in US history, completed 2011-2014 — has begun returning salmon to 65 miles of river habitat blocked for nearly a century, one of the most significant ecological recovery stories in national park history.