TCS Toronto Waterfront Marathon course & pace calculator
Starts on Yonge Street, climbs to Bloor and drops down Bathurst to the lake for an out-and-back on Lake Shore Boulevard West, then runs east to a turnaround in the Beaches and finishes at City Hall. Nearly all of the climbing is in the first 3 km.
- Climb
- 112 m
- Descent
- 124 m
- Low – high
- 70 m – 120 m
- Terrain at 3:00
- +0:42
- Typical start
- 9°C
- Sub-3 needs
- 2:59:18 flat
Course time calculator
Type h:mm:ss or use the step buttons.
9°C at your start → 12°C at the finish · dew point 6°C
Heat is scored with shade WBGT from temperature and humidity, starting to cost time above about 15°C (59°F) WBGT. Slower runners lose more because they are out longer. Wind, sun and rain are not modelled.
Certified distance only. Switch on to count the metres lost to corners, crowds and aid stations.
Same effort all the way: slower up the climbs, faster down the descents.
- Flat course
- 2:59:18
- Terrain
- +0:42
- Weather
- ±0:00
- Toronto Waterfront finish
- 3:00:00
Average 4:16 /km on course · 4:15 /km flat
Elevation profile
112 m up, 124 m down. Hover or tap the chart for the grade and your clock time at any point.
- Climb 2%+
- Climb 0.8–2%
- Flat
- Descent 0.8–2%
- Descent 2%+
- 1Yonge St north of Gerrard · 0.0 km
- 2Bloor & Bathurst · 3.0 km
- 3Lake Shore Blvd W turnaround · 12.3 km
- 4Harbourfront · 20.0 km
- 5The Beaches turnaround · 31.0 km
- 6Nathan Phillips Square · 42.2 km
Course splits for 3:00:00
Even-effort splits with the selected weather. Climbing and descent are per split, from the smoothed profile.
| Split | Pace | Split time | Clock | Up / down |
|---|---|---|---|---|
| 1 km | 4:29 | 4:29 | 4:29 | +16 m / −1 m |
| 2 km | 4:18 | 4:18 | 8:47 | +6 m / −5 m |
| 3 km | 4:16 | 4:16 | 13:03 | +2 m / −1 m |
| 4 km | 4:14 | 4:14 | 17:17 | +1 m / −4 m |
| 5 km | 4:10 | 4:10 | 21:27 | +0 m / −11 m |
| 6 km | 4:09 | 4:09 | 25:37 | +0 m / −13 m |
| 7 km | 4:11 | 4:11 | 29:47 | +0 m / −10 m |
| 8 km | 4:15 | 4:15 | 34:02 | +1 m / −1 m |
| 9 km | 4:17 | 4:17 | 38:19 | +3 m / −0 m |
| 10 km | 4:16 | 4:16 | 42:36 | +2 m / −1 m |
| 11 km | 4:13 | 4:13 | 46:49 | +1 m / −5 m |
| 12 km | 4:16 | 4:16 | 51:05 | +1 m / −0 m |
| 13 km | 4:15 | 4:15 | 55:20 | +0 m / −0 m |
| 14 km | 4:14 | 4:14 | 59:34 | +0 m / −1 m |
| 15 km | 4:20 | 4:20 | 1:03:54 | +6 m / −0 m |
| 16 km | 4:13 | 4:13 | 1:08:07 | +0 m / −5 m |
| 17 km | 4:15 | 4:15 | 1:12:22 | +1 m / −1 m |
| 18 km | 4:15 | 4:15 | 1:16:37 | +2 m / −4 m |
| 19 km | 4:18 | 4:18 | 1:20:55 | +5 m / −1 m |
| 20 km | 4:15 | 4:15 | 1:25:10 | +5 m / −8 m |
| 21 km | 4:24 | 4:24 | 1:29:34 | +14 m / −8 m |
| 22 km | 4:15 | 4:15 | 1:33:50 | +1 m / −2 m |
| 23 km | 4:15 | 4:15 | 1:38:05 | +2 m / −3 m |
| 24 km | 4:15 | 4:15 | 1:42:20 | +1 m / −1 m |
| 25 km | 4:16 | 4:16 | 1:46:36 | +2 m / −1 m |
| 26 km | 4:14 | 4:14 | 1:50:50 | +1 m / −3 m |
| 27 km | 4:18 | 4:18 | 1:55:08 | +5 m / −1 m |
| 28 km | 4:15 | 4:15 | 1:59:23 | +1 m / −3 m |
| 29 km | 4:14 | 4:14 | 2:03:37 | +1 m / −3 m |
| 30 km | 4:16 | 4:16 | 2:07:53 | +1 m / −0 m |
| 31 km | 4:16 | 4:16 | 2:12:09 | +1 m / −1 m |
| 32 km | 4:19 | 4:19 | 2:16:27 | +4 m / −0 m |
| 33 km | 4:20 | 4:20 | 2:20:47 | +6 m / −0 m |
| 34 km | 4:13 | 4:13 | 2:25:00 | +0 m / −5 m |
| 35 km | 4:13 | 4:13 | 2:29:13 | +0 m / −5 m |
| 36 km | 4:15 | 4:15 | 2:33:28 | +0 m / −2 m |
| 37 km | 4:14 | 4:14 | 2:37:42 | +0 m / −1 m |
| 38 km | 4:16 | 4:16 | 2:41:58 | +2 m / −0 m |
| 39 km | 4:17 | 4:17 | 2:46:16 | +3 m / −1 m |
| 40 km | 4:15 | 4:15 | 2:50:31 | +1 m / −1 m |
| 41 km | 4:15 | 4:15 | 2:54:46 | +1 m / −1 m |
| 42 km | 4:25 | 4:25 | 2:59:11 | +15 m / −8 m |
| Finish | 4:13 | 0:49 | 3:00:00 | +0 m / −1 m |
Race-morning weather
Air temperature and relative humidity by hour from the first wave’s 08:00 start, from 98 mornings within three days of the race date since 2011 at TORONTO CITY CENTRE, CA. Cool and warm are about the 10th and 90th percentile mornings by heat stress. Median wind 17 km/h.
The course moved to a Yonge Street start in 2025. This profile follows a third-party track of the 2026 layout.
| Local time | Cool | Typical | Warm |
|---|---|---|---|
| 08:00 | 5°C · 74% | 9°C · 81% | 15°C · 91% |
| 09:00 | 6°C · 73% | 10°C · 77% | 15°C · 89% |
| 10:00 | 7°C · 71% | 11°C · 71% | 15°C · 88% |
| 11:00 | 7°C · 71% | 12°C · 68% | 16°C · 86% |
| 12:00 | 8°C · 70% | 12°C · 63% | 17°C · 79% |
| 13:00 | 8°C · 74% | 13°C · 58% | 18°C · 74% |
| 14:00 | 8°C · 75% | 13°C · 61% | 18°C · 72% |
| Date | Start | +3 hours | Peak WBGT |
|---|---|---|---|
| 2024-10-20 | 10°C · 79% | 14°C · 81% | 19°C |
| 2023-10-15 | 8°C · 75% | 10°C · 64% | 13°C |
| 2022-10-16 | 7°C · 75% | 10°C · 74% | 14°C |
| 2019-10-20 | 9°C · 93% | 12°C · 86% | 16°C |
| 2018-10-21 | 2°C · 61% | 4°C · 59% | 9°C |
| 2017-10-22 | 13°C · 88% | 18°C · 78% | 20°C |
| 2016-10-16 | 18°C · 89% | 19°C · 90% | 23°C |
| 2015-10-18 | 3°C · 59% | 5°C · 52% | 9°C |
| 2014-10-19 | 4°C · 62% | 5°C · 61% | 9°C |
| 2013-10-20 | 5°C · 86% | 8°C · 76% | 12°C |
| 2012-10-14 | 13°C · 97% | 12°C · 94% | 17°C |
| 2011-10-16 | 9°C · 78% | 11°C · 71% | 14°C |
Data & method
- Route: Third-party reference track for the 2026 edition from Hellodrifter (https://www.hellodrifter.com/events/toronto-waterfront-marathon-2026), checked against the organizer's 2026 course map; not an official GPX. Measured at 42.34 km and scaled to 42.195 km.
- Elevation: Copernicus GLO-30 DEM (30 m), © DLR e.V. 2010–2014 and © Airbus Defence and Space GmbH 2014–2018, provided under COPERNICUS by the European Union and ESA. Sampled every 25–50 m, with bridges set to deck height and smoothed over 200–400 m.
- Weather: hourly observations from NOAA’s Integrated Surface Database (station 71265099999).
- Small climbs on flat courses can be terrain-model noise; they add only seconds to the estimates.
- This reference GPX has not been verified against the current edition. Check the organizer's latest course map before using its pacing plan.
Frequently asked questions
Is the TCS Toronto Waterfront Marathon hilly?
The course climbs about 112 m (367 ft) and descends about 124 m in total, which is flat. At even effort the terrain alone changes a 3:00 flat-course marathon by +0:42 and a 4:00 by +0:56.
What flat-course time do I need to break 3 hours at the TCS Toronto Waterfront Marathon?
About 2:59:18 on a flat course, assuming a typical race morning. For a sub-4 you need about 3:59:04. Switch the weather off in the calculator to see the terrain-only figure.
What is the weather usually like at the TCS Toronto Waterfront Marathon?
On a typical race morning it is about 9°C (49°F) at the first wave’s start and 12°C (53°F) three hours later, with a dew point near 6°C. That costs a 3-hour runner about 0:00 and a 4-hour runner about 0:00. Figures come from airport observations within three days of the race date since 2011.
How is the course-adjusted time calculated?
The course is cut into 100 m pieces. Each piece is run at your flat-course pace times a grade factor (about +3.3% per 1% uphill and −1.8% per 1% downhill) and a heat factor from shade WBGT at the time you reach it. Adding the pieces gives the course time, and the calculator works backwards from a goal the same way.