IRONMAN 5150 Ha Long Bay
About the race
5150 Ha Long Bay brings athletes to a destination shaped over millions of years, offering a new way to experience one of Vietnam’s most iconic landscapes. Framed by the UNESCO World Heritage landscape of Ha Long Bay, the race turns emerald waters, dramatic limestone formations and sweeping coastal horizons into the backdrop for a dynamic triathlon journey.
From the first stroke to the final stride, every kilometre offers a different perspective of Ha Long. The race combines the challenge of triathlon with the energy of a destination unlike any other, inviting athletes to push themselves, embrace the experience and discover what they can achieve.
More than a race through an extraordinary destination, 5150 Ha Long is an opportunity to experience the spirit of triathlon in a setting where nature and ambition meet. Whether taking on the distance as a new challenge or stepping up to the next level, every athlete becomes part of a journey that connects the timeless beauty of Ha Long with the energy of a new generation of triathletes.
Transition 1
Transition is conveniently located at Hon Gai Beach, creating the ultimate athlete-friendly setup. Store all your gear in one place and eliminate the complexity of split transitions – simply rack your bike, organize your run gear, and you're set for race day.
Located directly on the beachfront with immediate swim exit access, this centralized design creates smooth flow between all three disciplines. Your family and friends can easily support you through both transition moments from one location, while you benefit from using the familiar setup twice.
Cancellation policy
The course
Swim: 1.5km rolling start at Hon Gai Beach following an L-shaped anti-clockwise course with 4 turn buoys (1 lap). Bike: 40km flat 2-loop format along Tran Quoc Nghien Street with a U-turn at the 20km mark. Run: 10km 2-loop oceanfront route along Tran Quoc Nghien Street coastal boulevard.
Swim course
The 1.5km swim of the 2027 5150 Ha Long Bay will feature a rolling start at Hon Gai beach, following an L-shaped swim course going anti-clockwise, with four red buoys marking the four turning points. Athletes will complete one lap before heading back to the beach, leading directly into the beachfront transition area.
Bike course
The 5150 Ha Long Bay bike course delivers a spectacular journey through one of Vietnam's most iconic coastal landscapes. The ride starts at Hon Gai Beach, where participants launch onto the wide, ultra-smooth asphalt of Tran Quoc Nghien Street.
As cyclists press forward along this premier oceanfront boulevard, the flat and fast route opens into an uninterrupted seaside section. Here, challengers are fueled by sweeping, panoramic views of UNESCO World Heritage-listed Ha Long Bay, dramatic limestone karsts towering over emerald waters, and a refreshing coastal sea breeze.
Designed as a high-speed 2-loop format, competitors head back along the same stunning coastal corridor. At the 20km mark, athletes make a U-Turn to begin their second loop. Once the full 40km distance is complete, they will veer into the Transition Area to rack their bikes and head out for the run.
Race weekend schedule
Location
Hon Gai Beach, Ha Long, Vietnam Open in Google Maps
Know from the athletes
Good to know
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Are disc wheels permitted?
Yes. However, race organizers reserve the right to restrict use depending on conditions. Please view the competition rules for more information - https://www.ironman.com/competition-rules
In the event of a non-wetsuit swim, am I allowed to wear my compression gear?
Yes, provided that it is made of 100% textile material (no rubberized material such as polyurethane or neoprene) and that material does not extend past the elbows or knees. Any compression wear that extends past the elbows or knees will not be permitted in non-wetsuit swims (this includes compression sleeves, compression socks, or compression tights).
What do I do if I need assistance during the swim?
Water safety personnel and craft will be located on the water during the swim. They will have relevant equipment and are there to support you should you require. At any time should you require the assistance of water safety please raise one arm into the air and they will come to your aid. Should at any point in time you decide to abandon the swim, you will be taken to one of the swim extraction points. At this point in time, if required you will be checked over by medical and your timing band removed. If your timing band has been removed, do not attempt to re-enter the race.
Can I listen to music on the run?
iPods, MP3 players, phones, video cameras etc. are not permitted on the course. Please view the compeition rules for more information - https://www.ironman.com/competition-rules
If wetsuits are prohibited, what are the swimwear restrictions?
Swimwear (Skinsuits/Speedsuits) must be 100% textile material, which is defined as materials consisting of natural and/or synthetic, individual and non-consolidated yarns used to constitute a fabric by weaving, knitting and/or braiding. Simply put, this would generally refer to suits made only from nylon or Lycra that do not have any rubberized material such as polyurethane or neoprene. Swimwear must not cover the neck, extend past the elbows, nor extend past the knees. Swimwear may contain a zipper. A race kit may be worn underneath swimwear.
What kind of start does this race have?
Rolling start with athletes self-seeding in their start zones according to their expected finish time, refer to Athlete Information Guide for start zone times (It depends on the event).
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