Fight childhood cancer and receive a snazzy yellow shirt to boot at the 4th annual Lemon Run/Walk. The event is hosted by the Minnesota Chapter of Alex’s Lemonade Stand, a national nonprofit dedicated to raising funds for cancer research. $10 kids, $15 adults. 10:00 a.m. Rosland Park; 4300 West 66th St.; 952.927.8861; alexslemonade.org