2026 Cal Tri Castaic Lake - 6.20.25

18 EVENT OPTIONS. 6 Olympic distance events (Triathlon, RunBikeRun, SwimBike, SwimRun, 1640 Yard Swim & 10K Run), 6 Sprint distance events (Triathlon, RunBikeRun, SwimBike, SwimRun, 400 yard Swim & 5K Run) and 6 Youth Sprint distance events (Triathlon, RunBikeRun, SwimBike, SwimRun, 400 yard Swim & 5K Run). Triathlon = swim + bike + run. Typically, the swim and run distances are standard but the bike distance varies from race to race. Check out the course maps for more detailed information.

CASTAIC LAKE. 
The 35th annual Castaic Lake Triathlon takes place at scenic Castaic Lake just 20 miles north of Los Angeles. The Castaic Lake Recreation Area, located just north of Santa Clarita, is an 11,200-acre multi-use facility with two lakes, boating, world class fishing, hiking, walking, horseback riding, wake boarding, jet-skiing, camping, picnicking, kayaking, and sailing.  August is a great time to enjoy the water in the high 60s, and a staging area aptly named Paradise Cove. "Tri-cation" Friday night camping available through Castaic Lake.

THE COURSE. 
The swim course is a modified V shape in Paradise Cove at Castaic Lake, with 8 lifeguards in the water on paddleboards.  The bike course then goes out on back roads to limit your interaction with cars.  The bike course does include some U-turns on back roads to allow this, so athletes should slow down at the turn around points.  The run is primarily on the rolling trails overlooking Castaic Lake. 

WHO WE SUPPORT
All proceeds will benefit the Canyon High School Cross Country and Track Teams (we've been doing this for 33 years to support our programs).  

This is a great triathlon for new triathletes.  For years our coaches and athletes have encouraged new triathletes (young and old), and created a welcoming atmosphere of support.  We offer an enjoyable experience for triathletes of all experience levels.  

AIR TEMPERATURE (AVG).
Mid June temperatures are often cooler in the morning, with early morning fog burning off to reach the mid 80s.  Our event will possibly be around 60 degrees.

WATER TEMPERATURE (AVG). 

Water temps in June typically range in the mid to high 60s.  Email updates will be sent out closer to the race with updates. Use the 20% CALTRI2025 discount code at blueseventy. Note: Fusion wetsuits not eligible for discount.

Sprint & Youth Sprint Swim (400 yards)
Sprint & Youth Sprint Bike (6.7 miles)
Sprint & Youth Sprint Run (3.2 miles)

Olympic Swim (1640 yards)
Olympic Bike (23.3 miles)
Olympic Run (6.4 miles)

Staging Area

Athletes are responsible to study and know the course.  The race has 18 separate events and 2 different starting points.  Every event that includes a swim discipline starts at the beach.  The 5K/10K and RunBikeRun events start at the race finish line.  We highly recommend that athletes familiarize themselves with the bike and run course by driving or riding it prior to the race if possible. 

Go Digital.  Every Ride and Route on Ride with GPS can be downloaded as a TCX Course, TCX History, FIT Course, GPX Track, CSV, or KML file.  TCX Course and FIT Course files contain all the turn-by-turn navigation.  Instructions to do that are HERE. The alternative is to go old school and tape a copy of the turn by turn cue sheets on their bike.  There are police at major intersections and volunteer course marshals at other key locations as well as route arrows markings on the road.  The police are primarily there to provide athletes the right of way at intersections and not provide course instructions.  Athletes are responsible to study and know the course.

2025

2025 Results

Previous Races

2024

Saturday, June 13, 2026

Friday, June 19, 2026

Saturday, June 20, 2026

Events With A Swim Discipline Begin At Swim Start
Run & RunBikeRun Events Begin At Cal Tri Events Finish Arch
Only Athletes With Wristbands Are Allowed In Transition Area
Only Bikes With Stickers On Top Tube Are Allowed In Transition Area