Michael Zmijewski, president of Mr. David’s, on Mr. David’s Challenge an annual, community and fitness oriented event. This year, the Mr. David’s Challenge will be held on Saturday, August 24. This family-friendly event with a picnic atmosphere, with local entertainment held at the Mr. David's Headquarters in Itasca, Ill., features a 25k bike ride and 5k run/walk. Last Year the event had over 220 attendees and raised over $140k.