Weather and Event Alert System (EAS) What is the weather historically like on October 11?
What is the Event Alert System (EAS)? The Event Alert System (EAS) is a color-coded system that communicates the status of course conditions to participants leading up to and on race day. The levels range from Low (green) to Moderate (yellow) to High (red) to Extreme (black) based on a variety of factors, including weather conditions.