The annual Polar Bear Plunge & Chili Cook-Off is Saturday at Mud Island River Park. Brrr! Hundreds of plungers are freezin' for a reason to b-b-benefit Special Olympics of Greater Memphis. The People's Choice Chili Cook-Off Tasting goes from 10:30 a.m. to 2:30 p.m. Plunge registration – to plunge into the frigid waters of the Mighty Mississippi – is from 11 a.m. to 2:30 p.m. The Plunge Costume Contest is at 2 p.m. just before the Polar Bear Plunge at 2:30 p.m. Spectators are admitted free. Call 901-683-1271 or go to specialolympicsmem.org for more information.