That Dam Hill Timed Marathon and Ultra Marathon Races

Sat, Sep 19, 2026
Canada
London
100% asphalt
500–3,500
thatdamhill.ca

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Road runs in Canada, London

Distances

Running
Marathon
42.2 km
Start: 08:00 AM
100.00 EUR
Running
24 Hour Timed Race
24 km
Start: 08:00 AM
100.00 EUR
Running
Half Marathon
21.1 km
Start: 08:00 AM
75.00 EUR
Running
12 Hour (Night) Timed Race
12 km
Start: 08:00 PM
75.00 EUR
Running
6 Hour Timed Race
6 km
Start: 08:00 AM
50.00 EUR
Running
Charity 5K Fun Run/Walk
5 km
Start: 04:00 PM
25.00 EUR

About

That Dam Hill Marathon and Ultra Races are back for 2026 — a certified Boston Qualifier and Ottawa’s only timed ultra, with options from 5K fun run/walk up to 24-hour relay in Springbank Park, London, Ontario.

Catering & aid stations

On-course water stations and aid stations available throughout all race distances; details at the event information page.

Pacers

Pacemakers will be provided for the Half Marathon and Marathon — see the Race Schedule on the event page for target times per Startwave and look for Pacer flag markers on course. 24-hour and relay pacers are also available by request.

Results

View official results

Surface mix

100% asphalt

Typical weather in London

Monthly averages based on historical data (2000–present).

Jan-1°-8°

↑ 07:54

↓ 17:15

Feb0°-9°

↑ 07:24

↓ 17:56

Mar6°-4°

↑ 07:37

↓ 19:32

Apr12°2°

↑ 06:43

↓ 20:08

May19°9°

↑ 06:02

↓ 20:42

Jun24°15°

↑ 05:46

↓ 21:07

Jul26°17°

↑ 06:00

↓ 21:03

Aug25°17°

↑ 06:32

↓ 20:28

Sep22°13°

↑ 07:06

↓ 19:36

Oct15°7°

↑ 07:40

↓ 18:43

Nov8°1°

↑ 07:19

↓ 17:02

Dec2°-4°

↑ 07:50

↓ 16:52

Weather data by Open-Meteo

What's included in entry

Race numbers and timing chips
Medals for marathon and half marathon finishers
Event T-shirt (registered before Aug 15)

On-course water and aid stations
Pacers for Half Marathon and Marathon

Prices & signup

Charity 5K Fun Run/Walk25.00 EUR
Half Marathon75.00 EUR
Marathon100.00 EUR
6 Hour Timed Race50.00 EUR
12 Hour (Night) Timed Race75.00 EUR
24 Hour Timed Race100.00 EUR

FAQ

What are the start times for each distance?

5K Fun Run/Walk at 4:00 PM; Half Marathon, Marathon, 6-hour, and 24-hour races at 8:00 AM; 12-hour night race at 8:00 PM. All start lines are near the Stone Cottage in Springbank Park.

Is That Dam Hill a Boston Qualifier?

Yes — the marathon course is Boston-certified; see course details on the event information page.

Where can I pick up my race packet?

Packet pickup is at Springbank Park — Stone Cottage, 1085 Commissioners Road West, London, ON, Friday Sept 18 (4:00–8:00 PM) and Saturday Sept 19 (6:45–7:30 AM for marathon/half/6/24 hour races; 7:00–7:45 PM for the 12-hour night race).

Are there aid stations on course?

Yes, there are water stations and aid stations along the course for all distances; personal support tables are allowed on the outer edge of the track.

Last updated: Jun 5, 2026, 11:40:31 PM