Mermaid Half Marathon 10k & 5k San Diego

Set for its 13th annual running in 2024, after 2019’s race saw more than 2,000 runners cross the finish line in all three races combined, the Mermaid Series Half Marathon, 10K and 5K in San Diego is part of a five-race series that also features half marathons in Arizona and the San Francisco Bay Area. The Mermaid San Diego Half Marathon featured all-new courses for last year’s running, routes that start and finish within a stone’s throw — the starting line, at least — of SeaWorld San Diego park, along the shoreline of Mission Bay just north of downtown San Diego. From there, runners will make their way along a largely fast and flat route around the bay, with a course that rarely varies between 10 and 20 feet above sea level. Runners start the race on the western edge of the park near the Mission Bay boat launch and South Shores Park, and from there follow Mission Bay Parkway, Sea World Drive and Fiesta Island Road over onto Fiesta Island, a recreational island with mostly parks and beaches that overlooks the saltwater lagoon of Fiesta Bay and the Enchanted Cove.