That Dam Hill Marathon and Ultra Races are back for 2021! 

September 18, 2021

Springbank Park
1085 Commissioners Road West
London, Ontario, Canada


½ Marathon
12 Hour (Night) Timed Race
12 Hour (Day, Charity)
24 Hour Timed Race
24 Hour Relay (Charity)

8:00 AM Start Time
8:00 PM for the 12 Hour Night Race

Registration closes September 1. Registrants after August 15 may not get a shirt.

Click here to register for That Dam Hill Marathon and Ultra Races

Please support our designated charities!
        Dunn With Cancer logo      

More than a spectator friendly certified marathon race, That Dam Hill Marathon and Ultra Races is also London Ontario’s only ultra marathon timed race. If you register for a timed race, the first 42.2km (26.2 miles) you complete will automatically give you a certified marathon time. And YES, That Dam Hill is a certified Boston Marathon Qualifier!

And don’t worry, the hill isn’t that big. If anything, it’s more of a molehill.