Ottawa Fall Colours Marathon
Ottawa Fall Colours Marathon race day weather
Cool start, warming finish
Runners will face temperatures starting at 45°F and rising to 58°F by the finish. Light winds from the WSW may provide some variability, but they are unlikely to significantly impact pacing. With a humidity of 68%, runners should consider starting conservatively to manage the warming trend later in the race. The possibility of rain is minimal, so no gear adjustments are necessary for precipitation.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Ottawa Fall Colours Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Ottawa Fall Colours Marathon route and elevation
The Ottawa Fall Colours Marathon course has about 1,345 ft (410 m) of climbing and 1,345 ft (410 m) of descent, and finishes near the elevation it starts. It is hillier than 87% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. The hardest mile is mile 4, with 107 ft (33 m) of climbing and a 1.6% average grade.
Biggest climbs
- Miles 1.4 to 4.3: climbs about 195 ft (60 m).
- Miles 7.6 to 8: climbs about 100 ft (30 m).
- Miles 14.5 to 17.4: climbs about 195 ft (60 m).
What the hills cost
- 3:30 on a flat course is about 3:33 here (3 minutes slower).
- 4:00 on a flat course is about 4:03 here (3 minutes slower).
- 4:30 on a flat course is about 4:33 here (3 minutes slower).
Hills only, priced mile by mile on the course map. The pace calculator above adds the race-day weather.
Even-effort splits for a 3:30, 4:00 or 4:30 finish
| Mile | Climb | Descent | 3:30 | 4:00 | 4:30 |
|---|---|---|---|---|---|
| 1 | 49 ft | 94 ft | 7:45 | 8:51 | 9:57 |
| 2 | 96 ft | 25 ft | 8:31 | 9:44 | 10:58 |
| 3 | 33 ft | 34 ft | 7:55 | 9:03 | 10:11 |
| 4 | 107 ft | 21 ft | 8:39 | 9:54 | 11:07 |
| 5 | 38 ft | 36 ft | 7:56 | 9:04 | 10:13 |
| 6 | 26 ft | 53 ft | 7:50 | 8:56 | 10:03 |
| 7 | 55 ft | 115 ft | 7:41 | 8:48 | 9:54 |
| 8 | 98 ft | 32 ft | 8:29 | 9:41 | 10:54 |
| 9 | 25 ft | 103 ft | 7:38 | 8:44 | 9:49 |
| 10 | 62 ft | 52 ft | 8:00 | 9:08 | 10:16 |
| 11 | 27 ft | 78 ft | 7:44 | 8:51 | 9:57 |
| 12 | 46 ft | 52 ft | 7:54 | 9:01 | 10:10 |
| 13 | 78 ft | 54 ft | 8:07 | 9:17 | 10:26 |
| 14 | 56 ft | 71 ft | 7:53 | 9:00 | 10:07 |
| 15 | 84 ft | 45 ft | 8:14 | 9:25 | 10:36 |
| 16 | 44 ft | 28 ft | 8:03 | 9:12 | 10:21 |
| 17 | 101 ft | 27 ft | 8:33 | 9:46 | 10:59 |
| 18 | 39 ft | 38 ft | 7:56 | 9:04 | 10:12 |
| 19 | 33 ft | 47 ft | 7:52 | 9:00 | 10:07 |
| 20 | 45 ft | 121 ft | 7:39 | 8:44 | 9:50 |
| 21 | 85 ft | 32 ft | 8:22 | 9:33 | 10:45 |
| 22 | 36 ft | 103 ft | 7:40 | 8:46 | 9:52 |
| 23 | 74 ft | 47 ft | 8:08 | 9:19 | 10:28 |
| 24 | 27 ft | 57 ft | 7:49 | 8:55 | 10:03 |
| 25 | 46 ft | 67 ft | 7:50 | 8:58 | 10:04 |
| 26 | 78 ft | 57 ft | 8:06 | 9:15 | 10:25 |
| Last 0.2 | 8 ft | 8 ft | 1:46 | 2:01 | 2:16 |
Explore the Ottawa Fall Colours Marathon course with the weather and your pace along the route, or compare it with other races.
Get your personalized Ottawa Fall Colours Marathon race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
About the Ottawa Fall Colours Marathon
The Ottawa Fall Colours Marathon is run at the Cumberland Heritage Museum in Cumberland, Ontario, east of Ottawa, on Thanksgiving weekend. The marathon is two laps of a 21 km loop through the village and surrounding roads, starting and finishing at the museum. The course is certified and the marathon is a Boston Marathon qualifier. A half marathon, 10K, 5K, 3K and 1K events run alongside over the two days. Source
