Rio de Janeiro Marathon
Rio de Janeiro, Brazil · Sunday 9 May 2027
Rio de Janeiro Marathon, an annual road marathon held in Rio de Janeiro, Brazil, offers a scenic course along the city's famous beaches. The race includes a full marathon, half marathon, 10K, and 5K options. Runners can also participate in the \"Desafio Cidade Maravilhosa,\" completing both the half marathon on Saturday and the full marathon on Sunday. The course was changed in 2019 to start and finish in Flamengo Park.
Difficulty Calculator
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:m
:s
Adjusted Time
4:23:08
Time difference: +23.1 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain174m
Elevation High36m
Elevation Low2m
Weather Forecast
High32°C
Low23°C
Chance of Rain2%
How hard is Rio de Janeiro Marathon?
Very Difficultharder than 78% of marathons
Flattest / easiestHardest
On our difficulty model, Rio de Janeiro Marathon plays about 23 minutes slower than an average road marathon for a 3:30 runner. It ranks #249 hardest of 1151 marathons we analyse, and #2 of 6 in Brazil. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Rio de Janeiro Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Rio de Janeiro Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:12:59 | +12:59 |
| 3:30:00 | 3:47:52 | +17:52 |
| 4:00:00 | 4:23:08 | +23:08 |
| 4:30:00 | 4:58:46 | +28:46 |
| 5:00:00 | 5:34:44 | +34:44 |
| 5:30:00 | 6:11:01 | +41:01 |
| 6:00:00 | 6:47:37 | +47:37 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Rio de Janeiro Marathon 2027 Course Analysis
Rio de Janeiro Marathon is a full marathon held in Rio de Janeiro, Brazil. It is scheduled for Sunday 9 May 2027. The course is run on road surface with 174m of total climbing, with its high point near 36m above sea level. For registration and full race details, visit the official Rio de Janeiro Marathon website.
Elevation Profile
With 174m of total climbing, this is a gently undulating course. The elevation changes are manageable for most runners and shouldn't greatly affect your pacing.
Expected Race Day Weather
Based on historical weather data for May, the expected race day conditions are as follows. Hot conditions are expected, with temperatures between 23°C and 32°C. Heat is one of the biggest performance factors in distance running - for every degree above 15°C, finish times can slow by roughly 1-2%. Extra hydration and a conservative start are strongly recommended. There is a low chance of rain (2%), so dry conditions are likely.
Surface Type: Road
Rio de Janeiro Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Rio de Janeiro Marathon against other marathons to find the right race for your goals.
Marathons of similar difficulty
If Rio de Janeiro Marathon fits your goal, these courses play out about the same on our difficulty model.