Cal Tri Castaic Lake

Cal Tri Castaic Lake is a multisport festival held at Castaic Lagoon in northern Los Angeles County, California. The event offers 18 options: 6 Olympic-distance events, 6 sprint-distance events, and 6 youth events. Distances include Sprint Triathlon, Sprint RunBikeRun (5K run, 15K bike, 5K run), Sprint SwimBike, Sprint SwimRun, Sprint Swim (400 yards), and a 5K, plus Olympic formats such as Olympic RunBikeRun (5K run, 40K bike, 10K run), Olympic SwimBike, Olympic SwimRun, Olympic Swim (1640 yards), and 10K.

The course features significant bike elevation (around 3,211 feet in some events), and the lakefront setting supports a beginner-friendly, festival atmosphere with parking and lake access. Visit the organization's website for the most recent information.