Runners Half Marathon of Reston & 5K is set for Sunday, April 21, 2024. The racecourse has some rolling hills on beautiful, paved trails. The course will be well marked and lined with friendly and supportive volunteers to boost your spirits along the way. The half marathon and 5K races will both start along Seahawk Dr. The Half Marathon will start at 7:30 am, followed by the 5K start at 7:45 am. Both races will finish on the track at South Lakes High School.