IRONMAN 70.3 Brasilia
Brasilia, Brazil · April · IRONMAN 70.3
Why people love it
- Single hub at Pontao do Lago Sul for the swim start, both transitions and the finish
- Bike crosses the JK Bridge and runs the Esplanada dos Ministerios
- Fast and largely flat: 3:31:43 course record in 2025
- Calm, sheltered lake swim of 1.9 km (1.2 mi)
Watch out for
- Altitude about 1,000 m (3,300 ft) and dry-season sun
- Sunday road closures and parking limits near Pontao; plan a taxi
- Very few first-person reports, so course details are thin
- Water temperature and wetsuit rules were not published
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 27% of the overall score.
- Racer satisfactionLoved3.5
Few first-person accounts. Press and organisers describe a well-attended 2025 return after a decade away. · Low confidence
- OrganizationWell run3.7
Run from a single hub at Pontao do Lago Sul with no reported course errors, though athlete feedback is thin. · Low confidence
- First timer friendlyDoable3.4
Mostly flat, wide roads and a single hub help. Dry heat and about 1,000 m (3,300 ft) of altitude add load. · Low confidence
Course traits, not part of the score
- PR potentialFast4.1
Hidalgo set a 3:31:43 course record in 2025, and organisers call the bike quick and largely level. Altitude costs some pace. · Medium confidence
- Course easeModerate3.8
Fast, largely flat course. Altitude and dry heat are the main stresses. · Low confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.
- Wetsuit legalSeldom2.4
No water temperature is published. A warm Brazilian lake is likely above the 24.5 °C (76.1 °F) limit in many years. · Low confidence
- Water temperatureAcceptable3.2
No published temperature. A warm Brazilian lake likely sits around 24-26 °C (75-79 °F). · Low confidence
- Calm waterMostly calm4.3
Sheltered urban lake. A 2015 preview describes calm water on a rectangular course. · Medium confidence
- Swim easeEasy4.0
Simple rectangle on a lake, starting at the transition hub. No navigation complaints found. · Low confidence
- Swim experienceGreat3.5
Lake views with the Lago Sul skyline. No reports on clarity or crowding. · Low confidence
Bike
Road surface, closures, scenery and wind. Counts for 19% of the overall score.
- Road surfaceGood3.8
Wide capital avenues and the JK Bridge, likely well paved, but no athlete surface reports. · Low confidence
- Road closuresMostly closed3.6
The spectator guide says some Sunday roads are only partly closed. · Low confidence
- Bike sceneryBeautiful4.1
The route passes the Esplanada dos Ministerios, UNESCO-listed Niemeyer architecture and the JK Bridge. · Medium confidence
- WindMostly calm3.5
Open lakeside and bridge sections, but no reports of notable wind. · Low confidence
Course traits, not part of the score
- Bike speedFast3.9
Organisers describe a quick, largely level 90 km (56 mi) bike on wide roads. · Medium confidence
- Bike flatnessMostly flat3.7
Described as largely level. No elevation total is published, so bridge and avenue rollers are possible. · Low confidence
- Bike simplicityMostly simple3.8
Wide avenues with a turnaround near the Cathedral. No technical sections reported. · Low confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportDecent3.2
The hub at Pontao has bleachers, but the lakeside trail run limits crowds. Reports are sparse. · Low confidence
- Aid stationsGood3.6
Standard IRONMAN aid, with no complaints found. · Low confidence
- Run sceneryBeautiful3.9
Lakeside park trails with city skyline views. · Low confidence
- Run conditionsModerate3.1
Dry-season sun on a lakeside route with unknown shade, at about 1,000 m (3,300 ft). · Low confidence
Course traits, not part of the score
- Run flatnessMostly flat3.8
Lakeside path run on the Peninsula dos Ministros. No elevation total was found. · Low confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.
- Air temperaturePleasant3.5
April highs are roughly 18-28 °C (64-82 °F), but race-day readings were not found. · Low confidence
- Weather reliabilityReliable3.8
Late April is the start of the dry season, and no cancellations were found. · Low confidence
- Venue beautyLovely4.0
Modernist capital with a large man-made lake and the Pontao do Lago Sul. · Medium confidence
- Spectator friendlyEasy4.1
Start, both transitions and finish share Pontao, and the Esplanada and JK Bridge are named viewing points. · Medium confidence
Course traits, not part of the score
- Low altitudeElevated2.3
Lake Paranoa sits at about 1,000 m (3,300 ft). · Medium confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.
- Hotel availabilityGood3.8
Capital with many hotels, though fewer on the lakeside. No sell-outs reported. · Low confidence
- Hotel valueNormal3.3
No race-week prices found; business-travel pricing is likely mid-range. · Low confidence
- WalkabilitySome driving2.8
Organisers recommend taxi or ride-hailing on race morning, and parking at Pontao is banned until 08:00. · Low confidence
- Travel easeEasy3.6
Brasilia airport is a national hub about 15 km (9 mi) away, but international connections mostly go via Sao Paulo. · Low confidence
- LogisticsSimple4.0
Swim start, T1, T2 and finish are all at Pontao do Lago Sul. · Medium confidence
- Town and foodGood3.7
Large capital with good restaurants, though Lago Sul is spread out. · Low confidence
Key facts
- Location
- Brasilia, Distrito Federal, Brazil
- Typical month
- April
- Latest or next date
- 18 April 2027
- Organiser
- IRONMAN 70.3
- Field size
- About 1,600 athletes
- Distances
- 1.9 km (1.2 mi) swim, 90 km (56 mi) bike, 21.1 km (13.1 mi) run
- Swim venue
- Lago Paranoa at Pontao do Lago Sul (lake)
- Air temperature
- 18–28 °C (64–82 °F)
- Humidity
- Dry season starting in late April (climatology, approximate)
- Altitude
- 1,000 m (3,280 ft)
- Nearest airport
- Brasilia International (BSB), 15 km (9 mi) away
- Where to stay
- Lago Sul, Asa Sul
- Booking
- No sell-out reports found.
What racers and reviewers say
- Correio BrazilienseRaced 2025 · article · Positive
Newspaper report on the 2025 return after a decade: 1,600 athletes, swim in Lago Paranoa, bike through the Esplanada and over the JK Bridge, run on Peninsula dos Ministros. Hidalgo set a course record of 3:31:43.
- Unlimited Sports (organizer) spectator guideRaced 2026 · article · Positive
Organizer guide naming Pontao do Lago Sul as the hub for swim start, both transitions and finish, with the Esplanada, JK Bridge and Peninsula dos Ministros as viewing points. Warns that Sunday roads around the venue are partly closed and parking is restricted.
- Endurance Sports Wire (IRONMAN release)Raced 2025 · article · Positive
Announcement of the 13 April 2025 return. Organizers describe a quick, largely level bike and credit climate and wide roads for a competitive, fast race.
“The climate and wide roads contribute to an extremely competitive and fast race.”
- Triathlete: Don, Carfrae win 70.3 BrasiliaRaced 2014 · article · Positive
Results story from the 2014 edition: bike around Lake Paranoa, a picturesque city run, and a nod to the UNESCO-listed architecture. Tim Don won in 3:46:55 and Mirinda Carfrae in 4:15:01.
- 220 Triathlon: Brasilia gets the nodRaced 2015 · article · Positive
2015 preview as a regional championship: rectangular swim in calm Lake Paranoa, a three-lap bike through the embassy area and over the JK Bridge, three-lap lakeshore run.
Show 2 more
- Diario de Cuyo (Argentine athlete result)Raced 2014 · article · Mixed
Local report on an Argentine age-grouper who took 37 minutes for the lake swim and about 5:39 overall; the bike was run without drafting.
- Jornal de Brasilia: 2026 editionRaced 2026 · article · Positive
Preview of the 26 April 2026 race: about 1,500 registrations including 38 professionals, start and finish again at Pontao do Lago Sul.
Sources
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