Unlike the polar plunge you take each morning when you step through your front door, this challenge comes with considerable perks. The 2014 event drew 15,000 participants statewide and raised more than $3.8 million on behalf of Special Olympics Minnesota. While flinging one’s body into ice-cold water requires a dash of madness, aquatic skills are not requisite. Bring your best friend. Bring your boss. Bring your dad. Bring two pairs of shoes and a second set of clothes. The hard part will be over before you know it. Online registration recommended. Day-of registration open from 11 a.m.–1 p.m. Free shuttles and heated changing/staging tents provided. All ages; kids under 18 need a parental waiver. $75 in pledged donations per person to participate. Plunging begins 1 p.m. Fish Lake Regional Park, 14900 Bass Lake Road; 612.604.1280; plungemn.org