The hook
Three parks in one: a temperate rainforest that receives up to four metres of rain a year and grows moss in curtains, a wild coastline of sea stacks and tide pools, and glaciated mountains in the middle — with no road crossing the interior.
01Why it's worth it
The Olympic peninsula was isolated long enough to evolve its own species, and the park protects the result across radically different zones you can drive between in a morning. The Hoh and Quinault valleys are among the few temperate rainforests on Earth, Sitka spruce and hemlock hung with club moss, with Roosevelt elk moving through them — the park was originally created partly to protect that herd. The Pacific coast strip is separate and stranger: Rialto and Ruby beaches with sea stacks offshore, driftwood the size of trucks, and tide pools worth timing a low tide for. Hurricane Ridge gives the alpine version, wildflower meadows and the Bailey Range across the valley. It's UNESCO-listed for exactly this range.
Honest notes: it rains, a great deal, and the "dry season" is narrow. The park has no through road, so distances between the three zones are longer than the map suggests. Coastal hikes require tide tables — people get cut off on headlands every year.
02How to experience it
Give it four days and treat the three zones separately: a rainforest walk in the Hoh (early, for elk and empty trails), a coast day timed to low tide, and a clear afternoon on Hurricane Ridge. Base in Forks or Port Angeles. Carry rain gear regardless of forecast, and check tide tables before any beach walk.
From the locals
The single most repeated recommendation is specific and modest: "you shouldn't miss the Hoh Rainforest trail. It is so beautiful — we walked into a herd of Roosevelt elk." That combination, ancient moss-hung forest and large animals moving through it at close range, is what people come back describing.