The 2012 OC Marathon and Half Marathon takes place on Sunday, May 6. The event weaves through Newport Beach and Costa Mesa with multiple road closures to allow the runners to safely navigate the course. The areas of the community most impacted are Fashion Island, Corona del Mar, Balboa Island, Promontory Point, Linda Island, Harbor Island, Dover Shores and Irvine Avenue. Full road closures and alternative routes are posted on the OC Marathon's website - ocmarathon.com/road-closure-info.aspx or by calling 949-222-9888 or email traffic@ocmarathon.com.