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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| 10K | 10K | Nov 7, 20277:00 AM | $38.86$48.86 after May 9, 2027 | – |
| 5K | 5K | Nov 7, 20277:00 AM | $38.86$48.86 after May 10, 2027 | – |
| Olympic RunBikeRun (5km run, 39km bike, 10km run) | Duathlon | Nov 7, 20277:00 AM | $133.86$158.86 after May 9, 2027 | – |
| Olympic Swim (1640 yards) | 1 Mile | Nov 7, 20277:00 AM | $38.86$48.86 after May 9, 2027 | – |
| Olympic SwimBike | AquabikeSwim 1,497 m · Bike 24.8 miOpen water swim | Nov 7, 20277:00 AM | $133.86$158.86 after May 9, 2027 | – |
| Olympic SwimRun | SwimRunSwim 1,497 m · Run 6.2 miOpen water swim | Nov 7, 20277:00 AM | $133.86$158.86 after May 9, 2027 | – |
| Olympic Triathlon | Olympic TriathlonOpen water swim | Nov 7, 20277:00 AM | $133.86$158.86 after May 9, 2027 | – |
| Sprint RunBikeRun (5km run, 13km bike, 5km run) | Duathlon | Nov 7, 20277:00 AM | $133.86$158.86 after May 10, 2027 | – |
| Sprint Swim (400 yards) | Other | Nov 7, 20277:00 AM | $38.86$48.86 after May 10, 2027 | – |
| Sprint SwimBike | AquabikeSwim 400 yd · Bike 9 miOpen water swim | Nov 7, 20277:00 AM | $133.86$158.86 after May 10, 2027 | – |
| Sprint SwimRun | SwimRunSwim 400 yd · Run 3.1 miOpen water swim | Nov 7, 20277:00 AM | $133.86$158.86 after May 10, 2027 | – |
| Sprint Triathlon | Sprint TriathlonOpen water swim | Nov 7, 20277:00 AM | $133.86$158.86 after May 10, 2027 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Duathlon fee goes up to $158.86 on May 9, 2027.
Around November 7, the 105-acre lake nearest the race typically runs about 67°F at the surface (65 to 69°F across 2011 to 2020). Wetsuits were legal every year at this date.
A model estimate from the USGS lake temperature model (daily surface temperatures for US lakes), not a measurement; matched to the largest lake near the race's listed location, about 1.7 km away. Wetsuit cutoffs are USA Triathlon age-group rules. The race's own water temperature reading on race morning decides.
Online registration closes Nov 7, 2027, unless the race fills first.
At $38.86, entry is about 14 percent below a typical 10K in California, which costs $45 right now.
Sunrise on race morning is at about 6:15 AM, and the Olympic RunBikeRun (5km run, 39km bike, 10km run) starts at 7:00 AM. The start sits about 120 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Newport Dunes Waterfront Resort & Marina - (Parking 15 Dollars), Newport Beach, CA 92660
The pin marks the address the race lists, which is usually the start. Course maps are the organizers' own.
The 8.2-mile bike course climbs 230 feet, about 28 feet a mile: rolling.
| Course | Distance | Climbing | Terrain |
|---|---|---|---|
| Cal Tri Newport Dunes - Sprint - SwimSwim, point to point | 350 m | ||
| Cal Tri Newport Dunes - Sprint - BikeBike, out and back, steepest 6% | 8.2 mi | 230 ft | rolling |
| Cal Tri Newport Dunes - Sprint - RunRun, out and back, steepest 9% | 3 mi | 92 ft | rolling |
From the course maps the organizers publish on Ride with GPS and MapMyRun; climbing is the total gain the map reports. Courses can change between editions, so check the date on the map.
National lists computed from results, entry fees, course maps and water temperatures; they refresh through the day.
Around November 7 the day usually runs from 54°F at dawn to 72°F in the afternoon, with measurable rain on about 7% of days. Cold snaps dip to 49°F and hot years reach 82°F.
Based on 70 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
What the organizers of 2027 Optimism Cal Tri Newport Dunes - 11.7.27 cover on their registration page, in brief.
Schedule and packet pickup
SATURDAY SCHEDULE. 7:30 AM - Athletica Swim & Coaching Clinic ( RSVP Required ). 9:00 AM - Captain's Meeting + Saturday Volunteer. 11:00 AM - Packet Pick Up & Bike Drop-Off Opens (Suggested But Not Mandatory) @ Newport Dunes Waterfront…
Course
Sprint Swim (400 yards). Sprint Bike (8.2 miles). Sprint Run (3.1 miles). Olympic Swim (1640 yards). Olympic Bike (24.4 miles). Olympic Run (6.1 miles). Staging Area. Parking Map. Athletes are responsible to study and know the course. The…
Organize this race? Add details or a correction
2027 Optimism Cal Tri Newport Dunes - 11.7.27. 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. Also started in 1978 was the Ironman World Championship Triathlon Oahu but it moved to Kailua-Kona, Hawaii in 1981. This serves as the Cal Tri Events National Championship Race with registration in the 1500-2000 range.