location_city Castaic
location_on California
flag United States
calendar_today 20 Jun, 2026
directions_run Running
language Official Website
Register2026 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.
Jun 20, 2026
Distance — 5K
Type — Road running
08:00
Jun 20, 2026
Distance — Sponsor - 10x10 Tent
Type — Road running
08:00
Jun 20, 2026
Distance — Sprint RunBikeRun (5km run 15km bike 5km run)
Type — Road running
08:00
Jun 20, 2026
Distance — Sprint Swim (400 yards)
Type — Road running
08:00
Jun 20, 2026
Distance — Sprint SwimBike
Type — Road running
08:00
Jun 20, 2026
Distance — Sprint SwimRun
Type — Road running
08:00
Jun 20, 2026
Distance — Sprint Triathlon
Type — Road running
08:00
Jun 20, 2026
Distance — Youth 5K
Type — Road running
08:00
Jun 20, 2026
Distance — Youth Sprint RunBikeRun (5km run 15km bike 5km run)
Type — Road running
08:00
Jun 20, 2026
Distance — Youth Sprint Swim (400 yards)
Type — Road running
08:00
Jun 20, 2026
Distance — Youth Sprint SwimBike
Type — Road running
08:00
Jun 20, 2026
Distance — Youth Sprint SwimRun
Type — Road running
08:00
Jun 20, 2026
Distance — Youth Sprint Triathlon
Type — Road running
08:00
Jun 20, 2026
Distance — 10K
Type — Road running
08:20
Jun 20, 2026
Distance — Olympic RunBikeRun (5km run 40km bike 10km run)
Type — Road running
08:20
Jun 20, 2026
Distance — Olympic Swim (1640 yards)
Type — Road running
08:20
Jun 20, 2026
Distance — Olympic SwimBike
Type — Road running
08:20
Jun 20, 2026
Distance — Olympic SwimRun
Type — Road running
08:20
Jun 20, 2026
Distance — Olympic Triathlon
Type — Road running
08:20
These values represent the 3-year monthly averages for June in Castaic.
Castaic is a rural town at the northern end of the Santa Clarita Valley, north of Los Angeles.
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