Current forecast is for 76 degrees on Saturday in Azusa, but it will be much colder at the race starting lines up the canyon (estimated 40s at the full marathon start, 50s at the half marathon start). Please layer accordingly, and you will have the opportunity to put your clothes in your drop bag before the race starts. We will also give all participants a mylar blanket and gloves when they pick up their packet at the expo.
http://www.weather.com/weather/5-day/USCA0059