Several roads will be closed this weekend for the Ironman 70.3 Augusta. The 70.3-mile triathlon will begin at 7:30 a.m. Sunday with a 1.2-mile swim from the Augusta Riverwalk Marina to The Boathouse Community Center on Riverfront Drive. From there, the athletes will shift to the 56-mile cycling leg into South Carolina. The cycling leg will wind through Aiken County, passing through Jackson and New Ellenton on the route.