The Cal Tri DC event takes place at General Smallwood State Park near Washington, DC, offering a variety of endurance race options. Participants can choose from Olympic, Sprint, and Youth Sprint events, including triathlon, triathlon relay, run-bike-run, swim-bike, swim-run, and swim-run combinations. Triathlon relays allow teams of two or three athletes to complete the course together. The event features standard swim and run segments, with bike segments varying by race.