Qualla: Lake Crescent

Lake Crescent: Introduction

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Bala from Seattle, USA, CC BY 2.0. In 1937, fishermen on Lake Crescent hauled in something that was not a fish. The body of Hallie Illingworth, a waitress who had disappeared three years earlier, floated to the surface after the ropes weighting her down finally decayed. The near-freezing water had preserved her so completely that her skin had transformed into a waxy substance resembling ivory soap, a chemical process called saponification caused by lake minerals interacting with body fat. Her husband Monty was convicted of her murder. The lake that held his secret for three years would eventually yield another: in 2002, a 1927 Chevrolet belonging to Russell and Blanch Warren, who vanished while driving near the lake in 1929, was found more than 160 feet beneath the surface.

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Image: Bala from Seattle, USA | CC BY 2.0

Lake Crescent: Born from a Landslide

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Eian Ray, CC BY-SA 4.0. Lake Crescent owes its existence to catastrophe. Glaciers carved the valley during the last Ice Age, and the lake originally drained through Indian Creek into the Elwha River. Approximately 8,000 years ago, a massive landslide from the Olympic Mountains dammed Indian Creek, and t...

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Image: Eian Ray | CC BY-SA 4.0

Lake Crescent: Water the Color of Sapphires

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Miguel Hermoso Cuesta, CC BY-SA 4.0. Lake Crescent's brilliant blue water and exceptional clarity are not the result of depth alone, though at an official maximum of 624 feet it is the second deepest lake in Washington state after Lake Chelan. The clarity comes from low nitrogen levels that inhibit algae growth, lea...

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Image: Miguel Hermoso Cuesta | CC BY-SA 4.0

Lake Crescent: Trapped Fish, New Species

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Purefury182, CC BY-SA 4.0. When the landslide sealed Lake Crescent from the Elwha River system, the anadromous fish already living in the valley became landlocked. They could not ascend Lyre River Falls to reach the sea, and the sea could not reach them. Over thousands of years of isolation, two distinct s...

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Image: Purefury182 | CC BY-SA 4.0

Lake Crescent: Megatsunamis and Naming Rights

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Adbar, CC BY-SA 3.0. The lake's violent geological history did not end with its creation. Scientists have found evidence of four massive landslides entering the lake between roughly 5,200 BCE and 1,100 BCE. The most dramatic, around 1,100 BCE, was triggered by an earthquake that sent 7.2 million cubi...

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Image: Adbar | CC BY-SA 3.0