International marathon · Toronto, Canada · Mid October

TCS Toronto Waterfront Half Marathon course & pace calculator

Shares the marathon's start and first 20 km: up Yonge to Bloor, down Bathurst to the lake and out and back on Lake Shore Boulevard West, then north up Bay Street to City Hall. Flat after the opening climb, with a gentle rise to the finish.

Climb: 62 m
Descent: 74 m
Low – high: 70 m – 119 m
Terrain at 1:30: +0:22
Typical start: 9°C
Sub-1:30 needs: 1:29:38 flat

FlatCool morningsReference route

Goal time in Toronto Waterfront

Type h:mm:ss or use the step buttons.

9°C at your start → 10°C at the finish · dew point 6°C

ConditionsYour start

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.

Pacing

Same effort all the way: slower up the climbs, faster down the descents.

Flat-course half marathon you need

1:29:38to run 1:30:00 in Toronto Waterfront

Flat course: 1:29:38
Terrain: +0:22
Weather: ±0:00
Toronto Waterfront finish: 1:30:00

Average 4:16 /km on course · 4:15 /km flat

Pace band for this race

Elevation profile

62 m up, 74 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
4Queens Quay · 19.0 km
5Nathan Phillips Square · 21.1 km

Course splits for 1:30:00

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 / −4 m
3 km	4:16	4:16	13:03	+3 m / −2 m
4 km	4:14	4:14	17:17	+0 m / −4 m
5 km	4:10	4:10	21:27	+0 m / −11 m
6 km	4:09	4:09	25:36	+0 m / −14 m
7 km	4:11	4:11	29:47	+0 m / −10 m
8 km	4:15	4:15	34:02	+1 m / −2 m
9 km	4:17	4:17	38:20	+3 m / −0 m
10 km	4:16	4:16	42:36	+2 m / −1 m
11 km	4:14	4:14	46:49	+1 m / −5 m
12 km	4:15	4:15	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	+0 m / −1 m
18 km	4:14	4:14	1:16:36	+1 m / −4 m
19 km	4:18	4:18	1:20:54	+5 m / −1 m
20 km	4:16	4:16	1:25:10	+5 m / −8 m
21 km	4:25	4:25	1:29:35	+12 m / −1 m
Finish	4:14	0:25	1:30:00	+0 m / −0 m

Running a different course?Upload its GPX or FIT file and add your expected start temperature for an equal-effort plan.Upload your course →

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%

Past race days
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 21.17 km and scaled to 21.0975 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 Half Marathon hilly?

The course climbs about 62 m (203 ft) and descends about 74 m in total, which is flat. At even effort the terrain alone changes a 1:30 flat-course half marathon by +0:22 and a 2:00 by +0:29.

What flat-course time do I need to break 1:30 at the TCS Toronto Waterfront Half Marathon?

About 1:29:38 on a flat course, assuming a typical race morning. For a sub-2 you need about 1:59:31. Switch the weather off in the calculator to see the terrain-only figure.

What is the weather usually like at the TCS Toronto Waterfront Half 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 1:30 runner about 0:00 and a 2-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.