IRONMAN 70.3 Belgrade
About the race
mts IRONMAN 70.3 Belgrade offers an unforgettable triathlon experience combining a swim in Sava Lake, a fast bike ride along the capital's streets, and a scenic run passing iconic architectural landmarks.
Belgrade presents a must-see European destination rich in historical and cultural landmarks, astonishing cuisine, and vibrant atmosphere. During the race, athletes will experience the beauty of Sava Lake, the city's waterfront, and iconic structures including the magnificent Ada Bridge and Hall 1 of the Belgrade Fair.
The event features both individual general entry and relay team options, along with the Flex90 early entry offer allowing fee-free transfers or partial refunds for early registrants.
Flex90 Early Entry Benefits
Athletes registering on or before 14 February 2026 qualify for Flex90 benefits, which include fee-free transfers and partial refunds if plans change.
Relay Teams
Athletes can compete as a team of 2 or 3 participants, sharing the swim, bike, and run legs. All team members must be at least 18 years old on race day.
What your entry includes
The course
The race starts with a 1.9 km swim in the clear, calm waters of Sava Lake. The 90 km bike course is a fast, two-loop flat route leading through the straight streets of Belgrade, passing the Belgrade Fair and Ada Bridge. The 21.1 km run course is flat and fast around Ada Lake, surrounded by greenery and featuring three well-stocked aid stations.
Swim Course
Participants will start their competition by swimming a 1900 meter long course in the clear and calm water of Sava Lake, located in the heart of Belgrade.
Bike Course
Athletes experience Belgrade on a 90-kilometer bike ride divided into two loops along straight city streets. The route travels to the outskirts of Belgrade before returning via Lake Sava, the Belgrade Fair, and the iconic Ada Bridge. This fast, nearly flat cycling route offers great view of the city landscape.
Run Course
The run course offers a fast, flat terrain surrounding Ada Lake, shaded by greenery and lined with open-air gyms and vibrant public spaces. There are three well-stocked aid stations along the course (start, midpoint, finish).
Race weekend schedule
Location
City insight: Belgrade
Belgrade is the capital of Serbia, at the meeting point of the Sava and Danube rivers, with the Kalemegdan fortress, a lively river and nightlife scene and flat riverside paths. The climate is continental: summers (June to August) are hot, autumn is mild, winters (December to February) are cold with some snow, and spring is pleasant. Spring and autumn are the best seasons for racing, with the most comfortable days in May and September. The city has an international airport.
Know from the athletes
Good to know
How do I add my story to a race registration?
Log into your IRONMAN Profile and navigate to the Registrations page. Hover over the event of your choice, click on Race Details, and click on Tell Us Your Story to share your background and inspiration.
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How does pricing and registration for a relay team work?
The team captain creates the relay team during registration by selecting a team name and adding members. Team members receive a claim email to complete their registration. The captain pays the full registration fee at checkout.
Are two-person relay teams permitted?
Yes. Relay teams must consist of two or three athletes. Two-person teams may divide the swim, bike, and run legs in any combination.
Can I be a team member on two different relay teams?
No. Each athlete may only compete on one relay team per event.
Do all relay team members need to be the same age and gender?
No. Relay teams may include athletes of different ages and genders. All participants must be at least 18 years old on race day.
How do I request to switch a relay member?
Only the team captain may request team changes by contacting the event email address with the name of the member to be removed and the full name and email of the new member at least 10 days before race day.
My team partner did not receive the registration link. How can I resend it to them?
The team captain can log into their profile at https://my.ironman.com, go to Registrations -> Race Details -> Manage Registration -> Registration Claims, and click 'Resend emails for unclaimed registrations'.
What is the withdrawal policy for a relay team?
Relay team captains may be eligible for a partial refund, depending on the timing of the withdrawal.
Do all relay team members need to attend athlete onsite registration?
Yes. All relay team members must attend athlete onsite registration together with valid photo IDs.
What will a relay team need to bring to athlete onsite registration?
All relay team members must present a valid photo ID. Teams must be complete no later than two weeks before race day.
Does each relay team member receive a timing chip?
No. Each relay team receives one timing chip which acts as a relay baton passed between athletes in transition.
How are transition bags managed for relay teams?
Each relay team member is responsible for managing their own equipment for their race leg. Specific transition setups are provided on the relay team page.