Run the Bay from the Golden Gate Bridge to beautiful Berkeley, and there will be an extra medal waiting for you. Runners who participate in any distance event at The San Francisco Marathon and any distance event at The Berkeley Half Marathon consecutively will receive a special San Francisco/Berkeley Challenge medal commemorating their achievement.
(Example: If you ran the 2019 San Francisco Marathon, the 2019 Berkeley Half Marathon will be your second qualifying event for the challenge medal. If you are starting the challenge at the 2019 Berkeley Half Marathon, you will be eligible to medal at the 2020 San Francisco Marathon. The races must be run back to back.)