305 Triathlon
- Date
- Last held May 18, 2025, next date to be announced
- Location
- Key Biscayne, Florida
Registration for the next edition has not opened.
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Official race websiteWater temperature and wetsuits at 305 Triathlon
Around May 18, the water at NOAA's Virginia Key station typically runs about 83°F (81 to 86°F across 2016 to 2025). The water usually runs above 78°F at this date: wetsuits are allowed but make you ineligible for age-group awards.
Measured by the NOAA tide station nearest the race's listed location, about 0.7 km away; open beaches and sheltered bays nearby can differ by a few degrees. Wetsuit cutoffs are USA Triathlon age-group rules. The race's own water temperature reading on race morning decides.
Start location and course
Crandon Park, Key Biscayne, FL 33149
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Where 305 Triathlon ranks
- No. 30 of 50 on Warmest triathlon swims
National lists computed from results, entry fees, course maps and water temperatures; they refresh through the day.
Race details
- Where
- Crandon Park, Key Biscayne, FL 33149Map
- Course
- Road
- Distances
- Sprint Triathlon, Olympic Triathlon, Duathlon, Aquabike
- Editions
- 2025 (May 18, 2025), 2024 (Mar 3, 2024), 2023 (May 21, 2023), 2022 (May 15, 2022)
- Status
- The next edition has not been announced yet. Past events: Olympic Aquabike, Olympic Duathlon, Olympic Triathlon, Sprint Duathlon, Sprint Triathlon.
Organize this race? Add details or a correction
Quick answers
- When is 305 Triathlon?
- The next date has not been announced.
- How much does it cost?
- See the registration page for current pricing.
- What distances are offered?
- Sprint Triathlon, Olympic Triathlon, Duathlon, Aquabike.
- Where does it start?
- Crandon Park, Key Biscayne, FL 33149.
From the organizers
REGISTER HERE!!!
The Mack Cycle 305 Triathlon draws triathletes from across the world to meet in Miami!
The Mack Cycle 305 Triathlon is South Florida’s largest Sprint (1/3 Olympic Distance), Intermediate (2/3 Olympic Distance) and Olympic Distance Triathlon. It is held annually on the beautiful island of Key Biscayne. Key Biscayne is the main training ground for all of Miami’s endurance athletes.
The swim is in a calm area of the Atlantic Ocean.