That Dam Hill Marathon
Race Day Weather
Cool start, steady conditions
Runners will face a temperature range from 58°F to 68°F, with humidity averaging 72%. Wind will be light at 9 mph from the SE, with occasional gusts up to 17 mph. Runners should maintain a steady pace, staying hydrated and considering the humidity when adjusting their effort.
Pace Calculator
Get forecast alerts for That Dam Hill Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
That Dam Hill Marathon in London, Ontario, offers a certified Boston Marathon Qualifier course that is both spectator-friendly and ideal for setting personal bests. The event features a variety of race options, including a marathon, half marathon, and multiple timed ultra races, all set within the scenic Springbank Park. Organized by dedicated volunteers, the race supports cancer research, with all net proceeds benefiting the Dunn with Cancer charity.
