3 running events in Ajax, Ontario

From big races to Saturday morning group runs—find running events and connect with the local endurance sports community.

• Duffins Trail parkrun [parkrun.ca]
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  Every Saturday at 9:00 AM

  Description

  parkrun is such a simple concept: turn up every Saturday and volunteer, walk, jog or run 5k.

  5k parkrun Run Trail Walk

  Duffins Trail We Start Near The Parking Lot Cnr Elizabeth Str & Old Kingston Rd, Ajax, Ontario, Canada
  OpenStreetMap Google Maps
• Running4Home 2026 [raceroster.com]
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  Sat, May 30, 2026 at 8:00 AM

  Description

  May 30, 2026 / Ajax, ON

  5k 10k Run

  Trans Canada Trail, Ajax, Ontario, L1S 4X1, Canada
  OpenStreetMap Google Maps
• Ajax Waterfront Race [ajaxwaterfrontrace.ca] [Register at raceroster.com]
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  Sun, Oct 04, 2026 at 8:30 AM

  Description

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  Ajax Waterfront Race

  Sunday October 4, 2026

  Join us for a memorable day at the Ajax Waterfront as we celebrate our second year of bringing the community together for a fun and inclusive running...

  Ajax Waterfront Race

  Sunday October 4, 2026

  Join us for a memorable day at the Ajax Waterfront as we celebrate our second year of bringing the community together for a fun and inclusive running event. Whether you’re gearing up for a fall marathon, looking for a practice run, or simply wanting to enjoy a day out with family and friends, our Kids 1km, 5km, and 15km races offer something for everyone. Enjoy the beautiful scenery, feel the community spirit, and make lasting memories as we run together once again.

  1k 5k 15k Run

  Trans Canada Trail, Ajax, Ontario, L1S 4X1, Canada
  OpenStreetMap Google Maps

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