Glacial Lake Russell, Prehistoric glacial lake in Puget Sound, Washington, US
Glacial Lake Russell was a prehistoric glacial lake that existed in what is now the Puget Sound region of Washington during an ice age. It filled multiple basins including Eld Inlet, Budd Inlet, and Henderson Inlet at an elevation below today's sea level.
It formed about 16,900 years ago during the Vashon Glaciation and lasted roughly 1,000 years as ice margins shifted in the region. When the glacial ice retreated northward, the lake disappeared and gave way to new water drainage patterns.
The name honors Israel Cook Russell, a geologist who studied how glacial lakes formed in the Pacific Northwest. This ancient water shaped the land in ways that visitors can still see reflected in the terrain today.
The lake no longer exists, but geologists study the former lakebed to understand past climate changes and how the ecosystem transformed. Evidence of this ancient water remains visible in the soil layers and rock formations of the present landscape.
The water level dropped from about 160 feet to 120 feet above sea level as the ice margin shifted northward. This gradual change in elevation created the Black River drainage system that connected the vanishing lake to the coast.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
