Ironman 70.3 Austin
1.2 mile swim / 56 mile bike / 13.1 mile run. About the event The one-loop freshwater swim is in Decker Lake. Athletes will enjoy the scenic one-loop bike course through rolling Texas farmland, sprawling ranches, cedar-covered vistas and sunflower fields. The run course will take athletes through Walter E. Long Park and along the shores of Decker Lake.