Swim Across America (SAA), a national nonprofit organization dedicated to raising money for cancer research, prevention and treatment through swimming events across the country, will host its 20th annual Chicago open-water swim event Saturday, Aug. 4, at Ohio Street Beach in Chicago.

The fundraiser benefits the Rush University Cancer Center, which comprises all of the clinical, research and educational efforts at Rush University Medical Center. The Chicago swim aims to raise $250,000 through the participation of 350 swimmers, including former Olympians. To register for the swim or make a donation, visit www.swimacrossamerica.org/chicago.