Race along Romania's Black Sea coast at IRONMAN 70.3 Mamaia Constanta, Romania. The event combines the Black Sea coast with a fast and compact race course through Mamaia and Constanța, offering an ideal setting for a fast race and a potential personal best.
Athletes begin with a 1.9 km sea swim, followed by a predominantly flat 90 km bike course designed for speed and rhythm. The final 21.1 km run follows the coastline and brings athletes back towards the finish. The race features a single, compact transition area to keep race flow simple and efficient throughout the day.
General Registration opens on Thursday, 8 October 2026, offering options for Individual General Entry and Relay Team Entry.
The race features a single transition area, conveniently located directly next to the swim exit and close to the finish line. Its compact layout keeps the race flow simple and efficient for athletes throughout the day.
Experience the thrills of an IRONMAN 70.3 race day by sharing the fun and entering as a team. Relay teams must consist of two or three athletes, dividing the swim, bike, and run legs in any combination. All participants must be at least 18 years old on race day.
Swim 1.9 km open water in the Black Sea off Mamaia. Bike 90 km single-loop flat route on wide roads around Mamaia and Constanța. Run 21.1 km two-loop flat route along the promenade with Black Sea coastal views.
The 1.9 km swim takes place in the Black Sea, with athletes starting their race in the open waters off the coast of Mamaia. After completing the course, athletes return to shore and head directly into the transition area, located immediately beside the swim exit.
The 90 km bike course is a single-loop, flat route designed for fast, consistent riding. Leaving the transition area, athletes head onto wide roads around Mamaia and Constanța, with long sections that allow them to settle into an aerodynamic position and maintain their rhythm throughout the course.
The 21.1 km run course is a two-loop, flat route along the promenade, with the Black Sea beside you for much of the race. Athletes can settle into a steady pace while enjoying open coastal views and the support along the course, before returning to the heart of the event for the finish.
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During registration, the team captain creates the relay team by selecting a team name and adding at least one team member to claim the entry. Team members who receive a registration claim email from the captain can complete their registration directly via that link. If additional team members need to be added later, the team captain must contact the event email address. The new team member will then receive an email invitation to register. At the checkout, the team captain pays the full registration fee. Depending on the federation requirements of the host country, some team members may be required to purchase a one-day license during registration.
Yes. Relay teams must consist of two or three athletes. Two-person teams may divide the swim, bike, and run legs in any combination. A third team member may be added later if desired, up to two weeks prior to race day.
No. Each athlete may only compete on one relay team per event.
No. Relay teams may include athletes of different ages and genders. All participants must be at least 18 years old on race day.
Only the team captain may request team changes. Please contact the event email address and include the name of the team member to be removed, along with the full name and email address of the new team member. All changes must be completed no later than 10 days before race day.
As team captain, you can resend the registration email through your IRONMAN profile: Log into your profile at https://my.ironman.com, click on 'Registrations' in the left bar, click on 'Race Details' of your event registration, click on 'Manage Registration', click on 'Registration Claims' on the left column, and click the red button 'Resend emails for unclaimed registrations'.
Relay team captains may be eligible for a partial refund, depending on the timing of the withdrawal. Please refer to the Relay Teams page for full refund details and deadlines.
Yes. All relay team members must attend athlete onsite registration together. Each relay team will receive one bib number and one race package including swim cap, bike sticker, helmet sticker, and two bibs. Each team member will also receive their own race bag and finisher t-shirt.
All relay team members must present a valid photo ID. Teams must be complete no later than two weeks before race day. Any outstanding changes must be requested via the event email address before athlete onsite registration.
No. Each relay team receives one timing chip, which acts as a relay 'baton'. The cyclist collects the timing chip at bike check-in. The chip is transferred between athletes during transitions. The ankle strap and chip must always be worn until handed over. After finishing, the runner must return the timing chip to the cyclist so it can be returned during bike check-out.
Transition bag management for relay teams may vary depending on the event and venue setup. In general, each relay team member is responsible for managing their own equipment for their race leg. Transition bag availability will be communicated on a race-by-race basis.