Ken Alt of Winnetka prepares to take part in the Winnetka Park District's Leprechaun Leap at Tower Road Beach. | Buzz Orr~Sun-Times Media

Ken Alt of Winnetka takes part in the Winnetka Park District's Leprechaun Leap into Lake Michigan on Saturday at Tower Road Beach. | Buzz Orr~Sun-Times Media

Ken Alt of Winnetka pumps his arms after running out of the chilly waters of Lake Michigan during the Winnetka Park District's Leprechaun Leap on Saturday at Tower Road Beach. | Buzz Orr~Sun-Times Media

Kole Butler (far right) takes part in the Winnetka Park District's Leprechaun Leap into Lake Michigan with Lucca Figlioli (left facing camera) and Sy Butler (back to camera) on Saturday at Tower Road Beach. | Buzz Orr~Sun-Times Media

People walk towards Lake Michigan to witness and take part in the Winnetka Park District's Leprechaun Leap on Saturday at Tower Road Beach. | Buzz Orr~Sun-Times Media

People warm up after taking part in the Winnetka Park District's Leprechaun Leap into Lake Michigan on Saturday at Tower Road Beach. | Buzz Orr~Sun-Times Media

Dianne Butler of Rockford watched relatives take part in the Winnetka Park District's Leprechaun Leap into Lake Michigan on Saturday at Tower Road Beach. | Buzz Orr~Sun-Times Media

Ken Alt of Winnetka takes part in the Winnetka Park District's Leprechaun Leap into Lake Michigan on Saturday, March 16, 2013, at Tower Road Beach. | Buzz Orr~Sun-Times Media