Ranger Tales
Lake Crescent — the Blue Deep
Olympic Peninsula, Washington

Lake Crescent — the Blue Deep

The story

Lake Crescent is among the deepest lakes in Washington, plunging more than six hundred feet. Its famous clarity and intense blue come from very low nitrogen levels, which limit the algae that would otherwise cloud the water; visibility can reach sixty feet or more. The lake was glacially carved, then separated from neighboring Lake Sutherland by a landslide roughly eight thousand years ago. The historic 1915 lodge on the south shore hosted President Franklin Roosevelt in 1937, shortly before the park was established. US-101 follows the south shore, so you can take it in from the road.

That color out your window isn't a camera trick and it isn't the sky reflecting. That is the actual water. Lake Crescent runs so clear that on a calm day you can pick out a sunken log lying sixty feet down as if it were under glass, and so impossibly blue it almost doesn't look real. Here's the secret: the lake is starved of nitrogen, so almost nothing grows in it to cloud the water. No algae, no murk, just pure deep blue going down and down, the kind of blue you usually only see in a postcard that's been touched up. And it goes a long way down — more than six hundred feet, making this one of the deepest lakes in Washington. Ice-Age glaciers gouged the basin, and then, about eight thousand years ago, a great landslide came down and split this lake off from its neighbor, Lake Sutherland, sealing the two apart. The road you're on, Highway one-oh-one, hugs the south shore for miles, so you can drink all this in without ever leaving your seat. Look to the historic lodge on that shore. That's the nineteen-fifteen building, born as Singer's Tavern in its first life. On an autumn evening in nineteen thirty-seven, President Franklin Roosevelt sat by its fire, warming his hands while the lake went dark outside, and not long after that visit he all but signed this park into being. There's a whole history in those timbers. And brooding over the whole scene, that dark peak rising straight off the water, that's Mount Storm King. Cold, deep, and still, this lake is very good at keeping its secrets down where the light doesn't reach. For nearly three years it kept one terrible secret in particular, and that secret mattered more than anything to one woman who went into this water and didn't come out. Settle in here a moment. Ranger Boone has her tale.

Photo: Chris Light · CC BY-SA 4.0

Good to know
Where is Lake Crescent — the Blue Deep?
Lake Crescent — the Blue Deep is in Olympic Peninsula, Washington, in Olympic National Park. Lake Crescent is among the deepest lakes in Washington, plunging more than six hundred feet. Its famous clarity and intense blue come from very low nitrogen levels, which limit the algae that would otherwise cloud the w…
Is there an audio tour of Lake Crescent — the Blue Deep?
Yes — Lake Crescent — the Blue Deep is a stop on the Olympic National Park self-guided audio tour. The story plays automatically by GPS as you explore there, and works offline. Get the free Ranger Tales app on iPhone or Android.
More in Olympic National Park

Nearby stops

🎧 Get the tour

Hear Lake Crescent — the Blue Deep's story on the drive

Download the tour, leave your phone in your pocket, and let it play itself as you go. Works offline.

Buy the self-guided tour, or get it in the app.