Make a splash at the Polar Plunge at Lake Sammamish State Park !

Polar Plunge returns on New Year’s Day 2025. Festivities will begin at 10:30 a.m. with registration, music, and merriment brought to you by Clown Garage on the shores of Sunset Beach. The crowd will “plunge” at noon.

The first 300 registered participants will receive a Polar Plunge SWAG bag, including a commemorative pin from local company Pins by Design..

Spectators are welcome to come out to cheer on the athletes as they take a dunk in the chilly waters of Lake Sammamish.

Schedule for the Plunge:

Registration and Plunge HQ opens 10:30

• Costume Contest judging: 11:30

• Plunge at 12:00

Please dress for the weather and bring water shoes and/or socks.

Visitors will not need a Discover Pass to park at Lake Sammamish State Park.

Online registration is now closed. Please join us on January 1 and register onsite!

Glimpse of 2024 Polar Plunge Fun at Lake Sammamish State park