Cal Tri Castaic Lake
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2026 Cal Tri Castaic Lake
The event is scheduled for June 20, 2026 at Castaic Lagoon, 32132 Castaic Lake Drive, Castaic, California. Castaic Lake is described as the largest state water project reservoir in Southern California with over 11,000 acres of parkland and open space. The site supports water activities such as boating, jet skiing, and swimming. On-site parking is listed at $12.
Events, distances and entry details
There are 18 event options: six Olympic-distance events, six Sprint-distance events, and six Youth Sprint events. Event types include triathlon, RunBikeRun, SwimBike, SwimRun, standalone swims, and standalone runs. Specific distances noted include:
- Sprint RunBikeRun: 5 km run, 15 km bike, 5 km run
- Olympic RunBikeRun: 5 km run, 40 km bike, 10 km run
- Sprint swim: 400 yards
- Olympic swim: 1640 yards
- Standalone runs: 5K and 10K
Most adult multisport events show a price of $111.09 (includes fees). Swim-only and run-only entries are listed at $31.59. Youth Sprint events are listed as $0 for ages 7–17; youth registration opens May 23, 2026 and several youth events show 25 spots remaining. Some events note a 3211' bike elevation. Course maps and a traffic control plan are available for detailed route information. Visit the organization's website for the most recent information.
