Build your Brasília 70.3 plan
Your coach opens with the Brasília 70.3 set for April 18, 2027, asks about your week and your fitness, then writes every session of your 70.3 triathlon plan. Free, and you can start as a guest. About 25 weeks to go.
Start your Brasília 70.3 plan- Formats
- 70.3
- Terrain
- Flat
- Taper starts
- April 6, 2027
Brasília 70.3 distances
- 70.3 1.9 km swim, 90 km bike, 21.1 km run
Course
The Brasília 70.3 course
The 1.9 km swim is one loop in the calm, fresh water of Lake Paranoá. The 90 km bike follows the capital's wide avenues past its best-known landmarks on smooth roads that are mostly flat with some gentle rises and descents (the 2026 map shows a single 90 km lap).
Read the full course notes
The 21.1 km run is three flat laps on tree-lined park paths. The city sits above 1,000 m, so efforts feel slightly harder for athletes coming from the coast. The race returned to the calendar in 2025 after a 10-year break and has quickly become a fixture of the Brazilian season.
- Terrain
- Flat
- Formats
- 70.3
- Race-day conditions
- IRONMAN does not list an average water temperature, but Lake Paranoá measured 24 °C on race day in 2025, just under the 24.5 °C wetsuit limit, so a wetsuit swim is likely but not guaranteed. Expect about 18 °C at dawn and up to 28 °C by the run, with strong high-altitude sun as April moves into the dry season. Train with and without a wetsuit and wear sunscreen for the run.
What to train for
Wide, smooth avenues make this a steady-power bike: build to 2 x 30–45 minutes at 70.3 effort in the aero position, holding power over the gentle rises rather than surging.
Swim some race-pace sessions without a wetsuit in case the water comes in warm.
Weekly bricks of 30–45 minutes off the bike, some in late-morning heat, prepare you for the three-lap run as the sun climbs.
Sample week
A sample Brasília 70.3 training week
A week from the middle of the build, about six weeks out. Your plan sets the real distances and paces from your own fitness and adjusts them every week as you train.
- Monday
- Swim, 1 h: drills and technique
- Tuesday Key session
- Bike, 1 h 15 min with threshold intervals
- Wednesday
- Swim, 1 h: steady intervals at race effort
- Easy run, 50 min
- Thursday Key session
- Run, 50 min with tempo segments
- Friday
- Rest, or 20 minutes of mobility
- Saturday Key session
- Long ride, 3 h, then a 30 min run off the bike
- Sunday
- Long run, 1 h 30 min easy
Your build to race day
Taper
Tapering for the Brasília 70.3
Start the taper ten to fourteen days before race day. Trim the volume in all three sports, keep short race-pace efforts in each, and do one last short brick so running off the bike still feels familiar. The course is flat, so pacing decides the day: rehearse your goal pace in short segments during race week. With the race on April 18, 2027, your taper starts around April 6, 2027.
Also in Claude
Ask Claude for this plan
Add AthleteSpace to Claude once, then paste this prompt and put in your own numbers.
Build me a 70.3 triathlon season for the Nubank Ultravioleta IRONMAN 70.3 Brasília on April 18, 2027. I train about [hours] hours a week, [days] days a week.
Brasília 70.3 training questions
How long should I train for the Brasília 70.3?
Most athletes give a 70.3 triathlon sixteen to twenty weeks of focused training on top of an existing base. The coach counts back from your actual race date, so if you have less time than that it builds the best plan the remaining weeks allow rather than pretending you have longer.
What is the Brasília 70.3 course like?
Flat. The 1.9 km swim is one loop in the calm, fresh water of Lake Paranoá.
How cold is the water at the Brasília 70.3?
IRONMAN does not list an average water temperature, but Lake Paranoá measured 24 °C on race day in 2025, just under the 24.5 °C wetsuit limit, so a wetsuit swim is likely but not guaranteed. Expect about 18 °C at dawn and up to 28 °C by the run, with strong high-altitude sun as April moves into the dry season. Train with and without a wetsuit and wear sunscreen for the run.
When should I start tapering for the Brasília 70.3?
Start the taper ten to fourteen days before race day. Trim the volume in all three sports, keep short race-pace efforts in each, and do one last short brick so running off the bike still feels familiar. The course is flat, so pacing decides the day: rehearse your goal pace in short segments during race week. With the race on April 18, 2027, your taper starts around April 6, 2027.
Do I need an account to get a Brasília 70.3 training plan?
Start as a guest and save a free account later. Your coach writes your 70.3 triathlon plan and adapts it every week as you log your training. No card.