Talk about a grin and bare it situation.

Naturists in Surrey will be shouting "Happy Nude Year" on January 1 as they take a running leap into frigid B.C. waters in nothing but their birthday suits.

It's the fifth year area nudist groups will be holding the skinny-dipping version of the traditional polar bear plunge, in the icy waters of Boundary Bay at the naked-friendly Crescent Rock Beach.

Prizes will be handed out to youngest and oldest competitors, longest swim time, and best festive costume -- though organizers note that "less is often more."

The charity event will collect cash donations benefiting the War Amps Playsafe and childhood amputee programs.

Swimmers brave enough for the cold -- but too shy to strip -- can attend any of several other outdoor swims, including at Centennial Beach in Tsawwassen, Vancouver's English Bay and Rocky Point Park in Port Moody.