Cal Tri Newport Dunes
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Event overview
The 2025 Optimism Cal Tri Newport Dunes is scheduled for Sunday, November 2, 2025 in Newport Beach, California. The venue is Newport Dunes Waterfront Resort & Marina, 1131 Back Bay Dr, Newport Beach, CA 92660. The event began in 1978 as the Human Race Triathlon and is described as the longest running triathlon operating from the same location. It serves as the Cal Tri Events National Championship Race, with registration typically in the 1500-2000 range. The organizer offers free race transfers, deferrals, and participant transfers as late as the day before the race. Many events are listed as open to ages 18+.
Events and distances
There are 12 event options: six Olympic distance events and six Sprint distance events. Triathlon format is swim + bike + run. The swim and run distances are typically standard, while bike distances may vary; course maps provide more detail. Average water temperature is listed as 65 F and wetsuit use is legal. Visit the organization's website for the most recent information.
- Sprint RunBikeRun - 5 km run, 13 km bike, 5 km run
- Olympic RunBikeRun - 5 km run, 39 km bike, 10 km run
- Sprint Swim - 400 yards swim
- Olympic Swim - 1640 yards swim
- 5K - 5 km run
- 10K - 10 km run
- Sprint Triathlon - swim + bike + run
- Olympic Triathlon - swim + bike + run