The Key Biscayne Half Marathon is designed to take runners over a spectacular and naturally scenic course. The 13.1-mile route starts and finishes in beautiful Key Biscayne. Runners race along the Rickenbacker Causeway surrounded by lush tropical landscapes and superior ocean views. This course will present a vertical challenge, but will take your breath away with views of downtown Miami and Biscayne Bay. Athletes now have the opportunity to compete in the Key Biscayne Half Marathon as a Relay Team where teammates will each complete 6.55 Miles.