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Washington State Parks and Recreation Commission is beginning a process to update the long-term boundary for Pearrygin Lake State Park to include properties on the north shore of the lake. This change would result in all of Pearrygin Lake’s shoreline being within the long-term park boundary, allowing for future connection of a loop trail around the lake.
Formed by Glacial Meltwaters
Pearrygin Lake owes its existence to a quirk in the timing of melting glaciers. At the close of the Pleistocene ice age around 13,000 years ago, the huge Methow Valley glacier responsible for deepening the U-shaped Methow Valley persisted later than the tongues of ice that had flowed into the Chewack River Valley from a giant ice cap centered in today’s British Columbia.