Saturday morning's thunderstorms have forced Cowtown officials to delay the start of the 10K to 8:30 a.m. at Will Rogers Memorial Center.
The race will start with the adults 5K. The Kids 5K remains scheduled for a 9:30 a.m. start.
Weather must be clear before the races can start.
The Cowtown marathon, half and ultra will start at 7 a.m. Sunday.