Find running races in San Diego, CA. San Diego is a beautiful place for races year-round from 5k, 10k, half marathon and marathon distances to fun runs and m. So., Juli. The San Diego Running Meetup is a great place to meet other San Diego runners. We've got a great group of organizers who keep the calendar full of events. Do., Juli. “Because of the weather in San Diego, we can run just about days a year,” said Kate Garcia, president of the San Diego Track Club. Balboa Park 4 Mile Cross Country Sep 2, Trail Other. Crazy 8's 5K Cross Country Sep 23, Flash 9 download 5k. Half-marathonMarathonRelay. San Diego Santa Run Dec 9, Road 5k Fun Run. The Races Distances General Info Confirm Entry Course Charity Results Road Closures Elites. Where Athletes Find the Latest Endurance Events About RACEPLACE Event Director Login. Stairway to Heaven Ultra-Half Marathon and 15K.