That Dam Hill

Quick facts

Distance Marathon

About That Dam Hill

More than a spectator friendly certified marathon race, That Dam Hill 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!


Half Marathon

  • 21.097km


  • 42.195km


Award Medals

Earn a race buckle by completing 100km or more during the 24hr timed race


Lots of free parking near course start/finish area’s


Chip timing by MCM timing


Spring Bank Park

Springbank Park, London,ca


You start by completing a partial loop. Every loop after that will be a full loop measuring 2.2508km long.

For a certified Half-Marathon time, complete the partial plus 9 full loops.

For a certified Marathon time, complete the partial plus 18 full loops.

The race information has been found on the official website of the event or through publicly available sources. Always refer to the official website the latest race information. Please let us know if any data is wrong or missing, by emailing us.