Cal Tri Castaic Lake

JUN
20
2026
Race the 2026 Cal Tri at Castaic Lake on June 20 with 18 events from Sprint to Olympic and free youth races for ages 7 to 17. Swim, bike and run on scenic courses for all levels and enjoy a lively lakeside race day.
Sat 20 Jun 2026
Olympic Swim (1640 Yards) Youth 5k 10k Olympic Runbikerun (5km R...

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Event details

The 2026 Cal Tri Castaic Lake takes place on June 20, 2026. The event offers 18 race options across Olympic, Sprint, and Youth Sprint formats. Triathlon events combine swim, bike, and run. Swim and run distances are typically standard; bike distances vary by event. Multiple youth events are offered free to ages 7-17 at this race; several youth events list 25 spots available and registration opening May 23, 2026.

  • Sprint swim: 400 yards
  • Sprint RunBikeRun: 5 km run, 15 km bike, 5 km run
  • Sprint run: 5K
  • Olympic swim: 1640 yards
  • Olympic RunBikeRun: 5 km run, 40 km bike, 10 km run
  • Olympic run: 10K

Location and logistics

The venue is Castaic Lagoon at Castaic Lake, 32132 Castaic Lake Drive, Castaic, California 91384. Parking is listed at $12. The page notes average air temperatures of 56 F to 87 F and an average water temperature of 82 F. Some bike courses list a bike elevation of 3,211 feet. A sponsor option for a 10x10 tent is available; other tent sizes can be requested. Visit the organization's website for the most recent information.

10 km
10k
5 km
Youth 5k
5 km
Olympic Swim (1640 Yards)
Olympic Runbikerun (5km Run, 40km Bike, 10km Run)
Olympic Swimbike
Olympic Swimrun
Olympic Triathlon
Sprint Runbikerun (5km Run, 15km Bike, 5km Run)
Sprint Swim (400 Yards)
Sprint Swimbike
Sprint Swimrun
Sprint Triathlon
Youth Sprint Runbikerun (5km Run, 15km Bike, 5km Run)
Youth Sprint Swim (400 Yards)
Youth Sprint Swimbike
Youth Sprint Swimrun
Youth Sprint Triathlon

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