San Diego Beach & Bay Half Marathon

San Diego Beach & Bay Half Marathon is run in San Diego, California, on April 10, 2027. The half marathon (13.1 miles) starts at 6:30 a.m., the 10K at 7 a.m. and the 5K at 7:30. The half is a loop course along the San Diego waterfront, passing landmarks including SeaWorld and Belmont Park, and it carries minimal elevation change, which makes it an accessible option if you are after a fast time.

A flat loop on the road is the kind of course where a pacing plan actually holds, so decide your target pace in advance and check it at every mile rather than every water stop. For a personal best attempt, add two months of threshold work to your usual mileage. The 6:30 gun is the main logistical catch: eat early and get there earlier.