Save the date for the 5th Annual Chicago 5K Lung Run on Saturday, September 12, 2009! The Chicago 5K Lung Run is one of the largest 5K running events in Chicago. On September 12th, more than 1,500 runners, lung cancer survivors, and representatives of leading Chicago hospitals will participate in the 5th Annual Chicago 5K Lung Run -- a run, walk, and rally on the city’s beautiful lakefront.