Ottawa Marathon
Ottawa, Canada · Monday 24 May 2027
The Ottawa Marathon is a 42.2-kilometer race held annually in Ottawa, Canada, featuring a route that passes through various neighborhoods and across notable city landmarks. The course covers both Ottawa and parts of neighboring Gatineau, Quebec, offering views of the Rideau Canal, Parliament buildings, the Prime Minister's official residence, and the Governor General's residence.
Difficulty Calculator
h
:m
:s
Adjusted Time
3:59:49
Time difference: -0.2 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain201m
Elevation High80m
Elevation Low53m
Weather Forecast
High12°C
Low10°C
Chance of Rain96%
How hard is Ottawa Marathon?
Moderateharder than 39% of marathons
Flattest / easiestHardest
On our difficulty model, Ottawa Marathon plays about 4 minutes slower than an average road marathon for a 3:30 runner. It ranks #707 hardest of 1150 marathons we analyse, and #19 of 51 in Canada. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Ottawa 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 Ottawa Marathon | Difference |
|---|---|---|
| 3:00:00 | 2:57:41 | −02:19 |
| 3:30:00 | 3:28:42 | −01:18 |
| 4:00:00 | 3:59:49 | −00:11 |
| 4:30:00 | 4:31:03 | +01:03 |
| 5:00:00 | 5:02:23 | +02:23 |
| 5:30:00 | 5:33:48 | +03:48 |
| 6:00:00 | 6:05:19 | +05:19 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Ottawa Marathon 2027 Course Analysis
Ottawa Marathon is a full marathon held in Ottawa, Canada. It is scheduled for Monday 24 May 2027. The course is run on road surface with 201m of total climbing, with its high point near 80m above sea level. For registration and full race details, visit the official Ottawa Marathon website.
Elevation Profile
With 201m 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. Near-ideal running temperatures are expected, ranging from 10°C to 12°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a high chance of rain (96%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.
Surface Type: Road
Ottawa 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 Ottawa Marathon against other marathons to find the right race for your goals.
Marathons of similar difficulty
If Ottawa Marathon fits your goal, these courses play out about the same on our difficulty model.