Tamarack Homes Ottawa International Marathon fueling plan
Where every Tamarack Homes Ottawa International Marathon water and gel station falls at your pace, plus a carb and sodium plan built for your finish time.
Course route from organiser maps and OpenStreetMap data (© OpenStreetMap contributors, ODbL). Map tiles by Esri. Check the official course before race day.
Tamarack Homes Ottawa International Marathon
Sunday 30 May, 7:00 start
- Distance
- 42.2 km
- Aid stations
- 16
- Fruit
- At 5 stations
Something wrong with this course? Email us
Want training-aware nutrition around this race? See Mavr on the App Store
General guidance for healthy adults, not medical advice. Talk to a doctor or registered dietitian if you have a health condition, take medicines or have special dietary needs. Caffeine advice is for healthy adults only. EFSA's safe limit is 200 mg in one dose and 400 mg in a day.
Every Tamarack Homes Ottawa International Marathon aid station, and when you reach it
Time on the clock from your start, at an even pace. The organizer lists no gels on the course.
| Distance | What is there | 3:30 finish | 4:00 finish | 4:30 finish |
|---|---|---|---|---|
| 2 km | 42K & 21K Water Station 1 - Water, misting | 0:10 | 0:11 | 0:13 |
| 5.3 km | 42K Water Station 2 - Water, Xact Hydration, misting | 0:26 | 0:30 | 0:34 |
| 8.5 km | Xact Nutrition | 0:42 | 0:48 | 0:54 |
| 8.6 km | 42K & 21K Water Station 3 - Water, Xact Hydration, Xact Fruit Bars for marathon only, misting | 0:43 | 0:49 | 0:55 |
| 11.8 km | 42K & 21K Water Station 4 - Water, Xact Hydration, misting | 0:59 | 1:07 | 1:15 |
| 15 km | 42K & 21K Water Station 5 - Water, Xact Electrolytes, misting | 1:15 | 1:25 | 1:36 |
| 17.3 km | 42K & 21K Water Station 6 - Water, Xact Hydration, misting | 1:26 | 1:39 | 1:51 |
| 20.4 km | 42K Water Station 7 - Water, Xact Hydration, misting | 1:41 | 1:56 | 2:10 |
| 23 km | Xact Nutrition | 1:54 | 2:11 | 2:27 |
| 23 km | 42K & 21K Water Station 8 - Water, Xact Hydration, Xact Fruit Bars for full and half marathons, misting | 1:54 | 2:11 | 2:27 |
| 27.2 km | 42K & 21K Water Station 9 - Water, Xact Hydration, misting | 2:15 | 2:35 | 2:54 |
| 30.4 km | 42K Water Station 10 - Water, Xact Hydration, misting | 2:31 | 2:53 | 3:14 |
| 33.4 km | 42K Water Station 11 - Water, Xact Hydration, Xact Fruit Bars for marathon, misting | 2:46 | 3:10 | 3:34 |
| 33.5 km | Xact Nutrition | 2:47 | 3:10 | 3:34 |
| 36.3 km | 42K Water Station 12 - Water, Xact Hydration, misting | 3:00 | 3:26 | 3:52 |
| 39 km | 42K Water Station 13 - Water, Xact Hydration, misting | 3:14 | 3:42 | 4:10 |
From the organizer's published course information. Check the runner information again in race week.
Sample plans for three finish times
Built for a 70 kg runner in mild weather with Maurten Gel 100 (25 g) and water at the aid stations. Pick how much carbohydrate you want to aim for. Your own plan changes with your weight, gel and the weather.
A middle target most runners can train up to.
3:30 finish
4:59 per km
- 50 g carbs per hour
- 7 gels, first at 0:26 (5.3 km)
- 600 to 900 ml fluid per hour
4:00 finish
5:41 per km
- 50 g carbs per hour
- 8 gels, first at 0:30 (5.3 km)
- 600 to 800 ml fluid per hour
4:30 finish
6:24 per km
- 50 g carbs per hour
- 9 gels, first at 0:34 (5.3 km)
- 600 to 800 ml fluid per hour
3:30 finish
4:59 per km
- 75 g carbs per hour
- 10 gels, first at 0:26 (5.3 km)
- 600 to 900 ml fluid per hour
4:00 finish
5:41 per km
- 75 g carbs per hour
- 11 gels, first at 0:30 (5.3 km)
- 600 to 800 ml fluid per hour
4:30 finish
6:24 per km
- 75 g carbs per hour
- 13 gels, first at 0:15 (2.3 km)
- 600 to 800 ml fluid per hour
3:30 finish
4:59 per km
- 100 g carbs per hour
- 13 gels, first at 0:26 (5.3 km)
- 600 to 900 ml fluid per hour
4:00 finish
5:41 per km
- 100 g carbs per hour
- 15 gels, first at 0:16 (2.8 km)
- 600 to 800 ml fluid per hour
4:30 finish
6:24 per km
- 100 g carbs per hour
- 17 gels, first at 0:20 (3.1 km)
- 600 to 800 ml fluid per hour
Race-day facts
- Date
- Sunday, 30 May 2027
- Start
- 7:00
- Distance
- 42.2 km
Tamarack Homes Ottawa International Marathon fueling FAQ
Where are the water stations on the Tamarack Homes Ottawa International Marathon?
There are 16 aid stations, at 2 km, 5.3 km, 8.5 km, 8.6 km, 11.8 km, 15 km, 17.3 km, 20.4 km, 23 km, 23 km, 27.2 km, 30.4 km, 33.4 km, 33.5 km, 36.3 km and 39 km. 13 of them list water.
Are there gels on the Tamarack Homes Ottawa International Marathon course?
The organizer lists no gels on the course, so carry every gel you plan to take.
When does the Tamarack Homes Ottawa International Marathon start?
The race is on Sunday, 30 May 2027, starting at 7:00 local time. Check the organizer's runner information in race week, since wave times can change.
How many gels do I need for the Tamarack Homes Ottawa International Marathon?
It depends on your finish time and how much carbohydrate you have practised taking. At a steady target, a 4:00 finish uses about 11 gels of 25 g, or 75 g of carbs per hour. Enter your own pace, weight and gel in the calculator to get your number.