The Full Distance Triathlon California in Sacramento offers a fast, flat course perfect for personal records and unforgettable racing. Swim: Fast Downriver Start The 2.4-mile swim begins in the American River, flowing into the Sacramento River. Athletes finish near the Tower Bridge, with an average water temperature of 65°F (18°C). Bike: Flat and Scenic Ride The 112-mile bike course features two loops through Sacramento’s farm-to-fork region, showcasing the Central Valley’s stunning ...