Free race transfers, deferrals & participant transfers as late as the day before the race.

2025 Optimism Cal Tri Newport Dunes - 11.2.25
Started in 1978 as the Human Race Triathlon, Cal Tri Newport Dunes is the longest running triathlon in the world operating from the same location. Whether you're interested in outdoor adventures or family-friendly activities, this race has it all. John Wayne Airport (SNA) is a mere 4 miles from both the race venue, the Newport Dunes Waterfront Resort & Marina and our host hotel, The Hyatt Regency Newport Beach. From there, everything that Orange County has to offer is within reach. Visit Disneyland Park and Disney California Adventure Park, featuring thrilling rides, entertainment, and iconic characters. Explore the shops and restaurants of Balboa Island. This serves as the Cal Tri Events National Championship Race with registration in the 1500-2000 range.
 
Location
Newport Dunes Waterfront Resort & Marina - (Parking $15)
1131 Back Bay Dr
Newport Beach, CA US 92660

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. Triathlon Relay is 2 or 3 athletes combined to complete the triathlon. Check out the course maps for more detailed information. 

TO DO. Disneyland Park & California Adventure Park. Balboa Island Ferry. Newport Beach.

AIRPORT. John Wayne (SNA)

AIR TEMPERATURE (AVG). 57 F / 71 F

WATER TEMPERATURE (AVG). 65 F. Wetsuit legal. 

Cal Tri Kids Race Free!

Calling all future Olympians, tri-tastic heroes, & adventure seekers aged 7-17! Cal Tri Events is making dreams come true in 2024 by offering FREE racing for young athletes at every single event in our series! That’s right, kids can splash, pedal, & stride their way to glory in a variety of exciting formats, including:

Triathlon:Conquer the swim, bike, & run course like a true multisport champion.
Triathlon Relay: Team up with friends for a fun & fast adventure.
SwimBike: Master the power of water & wheels in this dynamic challenge.
SwimRun: Test your amphibious skills on land & sea.
400 Yard Swim: Conquer the water & showcase your aquatic prowess.
5K Run: Unleash your inner cheetah & take charge of the terrain.

This free-to-race initiative wouldn’t be possible without the generous support of our local and national sponsors and public-private partnerships. Now, we’re calling on YOU to spread the word!