Oslo Marathon
Oslo, Norway · Sunday 20 September 2026
Oslo Marathon is an annual event held between late September and early October in Oslo, Norway. The race features a flat course along the Oslofjord, with participants running two laps for the full marathon. The event includes a variety of distances, such as a half marathon, 10 km, and 3 km, making it accessible to runners of all ages and abilities. The marathon is part of a larger running festival, attracting thousands of participants each year.
Difficulty Calculator
h
:m
:s
Adjusted Time
4:05:33
Time difference: +5.5 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain228m
Elevation High69m
Elevation Low3m
Weather Forecast
High17°C
Low15°C
Chance of Rain76%
How hard is Oslo Marathon?
Difficultharder than 62% of marathons
Flattest / easiestHardest
On our difficulty model, Oslo Marathon plays about 8 minutes slower than an average road marathon for a 3:30 runner. It ranks #439 hardest of 1150 marathons we analyse, and #9 of 15 in Norway. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Oslo 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 Oslo Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:01:14 | +01:14 |
| 3:30:00 | 3:33:17 | +03:17 |
| 4:00:00 | 4:05:33 | +05:33 |
| 4:30:00 | 4:38:00 | +08:00 |
| 5:00:00 | 5:10:37 | +10:37 |
| 5:30:00 | 5:43:24 | +13:24 |
| 6:00:00 | 6:16:21 | +16:21 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Oslo Marathon 2026 Course Analysis
Oslo Marathon is a full marathon held in Oslo, Norway. It is scheduled for Sunday 20 September 2026. The course is run on road surface with 228m of total climbing, with its high point near 69m above sea level. For registration and full race details, visit the official Oslo Marathon website.
Elevation Profile
With 228m 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 September, the expected race day conditions are as follows. Moderate temperatures between 15°C and 17°C are expected. While comfortable for most runners, those targeting fast times should pay attention to hydration, as these temperatures can impact performance on race day. There is a high chance of rain (76%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.
Surface Type: Road
Oslo 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 Oslo Marathon against other marathons to find the right race for your goals.
Marathons of similar difficulty
If Oslo Marathon fits your goal, these courses play out about the same on our difficulty model.
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