More than 4,000 runners will take to the streets of St. Cloud Saturday morning for the 11th Annual Earth Day Half Marathon. The race, which is conducted by the Campus Recreation Department at St. Cloud State, begins on University Drive just outside the Hallenbeck Fieldhouse. Besides the half marathon, there will be a 20 mile Eco Challenge and a half marathon relay. Registration is closed, but the runners will need plenty of applause along their 13.1 mile journeys.