Orange County Triathlon Orange County Triathlon Lake Mission Viejo - June 3rd, 2018 Register Today Sign up to Volunteer SWIM 1.5 kilometers through the calm waters of Lake Mission Viejo with full lifeguard support and comfortable wave sizes. 1 2 1 2 BIKE 40 kilometers up and then down the Santiago Canyon. RUN 10 kilometers on the trails and surface streets near Lake Mission Viejo with aid stations just about every mile. 1 2 1 2 CELEBRATE with friends and family at the beach of Lake Mission Viejo. WILL YOU BE THERE? The Orange County Triathlon invites young and old, experienced and beginner athletes to join us at beautiful Lake Mission Viejo for a great race. Register Today
