Cal Tri Williamsburg is a July multisport race held at Jamestown Beach Park in historic Williamsburg, Virginia. While the event's focus is triathlon, offering Sprint, Olympic, and Youth Sprint distances, athletes can also compete in partial formats. These include SwimBike, SwimRun, RunBikeRun, swim-only events, a 5K, and a 10K.
The course is designed for speed, featuring flat terrain. The run utilizes a significant portion of the Virginia Capital Trail. In total, there are 18 race options: six Olympic-distance, six Sprint-distance, and six Youth Sprint races. This variety accommodates experienced triathletes, younger competitors, relay participants, runners, and swimmers seeking a shorter event.