5K races in Ajax
2 upcoming in Ajax, and 107 more within 100km. Every one links to the organizer's official registration page.
5k Run To Remember 2026
ON · Road · 5km · starts 9 a.m.
Ajax Waterfront Race
ON · Road · 1km / 5km / 15km · starts 8:30 a.m.
Within 100km of Ajax
Sorted by how far you would have to drive.
- 7 km
2026 Santa Shuffle Whitby: Fun Run & Elf Walk
Whitby, ON · Road · 5km · starts 10 a.m.
- 7 km
Running Room New Year's Run - Whitby
Whitby, ON · Road · 5km / 1km · starts 10 a.m.
- 7 km
Shoppers Drug Mart® Run for Women - Whitby 2027
Whitby, ON · Road · 5km / 10km / 1km · starts 8:30 a.m.
- 21 km
2027 Scarborough 5K
Scarborough, ON · Road · 5km / 1km · starts 10 a.m.
- 23 km
Stouffville Main Street 5K
Whitchurch-Stouffville, ON · Road · 5km / 1km · starts 8 a.m.
- 25 km
PHM Run for the Residents
Markham, ON · Road · 21km / 6km · starts 8 a.m.
- 25 km
Shoppers Drug Mart® Run for Women - Markham 2027
Markham, ON · Road · 5km / 10km / 1km · starts 9 a.m.
- 30 km
The Cider Run
Uxbridge, ON · Road · 1km / 3km / 8km / 16km · starts 8 a.m.
- 30 km
The Whole Enchilada
Uxbridge, ON · Road · 50km / 25km / 8km / 4km · starts 7:30 a.m.
- 36 km
PUMA Toronto Women's Summer 10K/5K
Toronto, ON · Road · 10km / 5km · starts 8 a.m.
- 36 km
Achilles International Canada Hope & Possibility®
Toronto, ON · Road · 5km · starts 8:30 a.m.
- 36 km
SuperPower 2026 - Toronto
Toronto, ON · Road · 5km / 10km / 15km · starts 9:30 a.m.
- 36 km
UNFINISHED Series
Toronto, ON · Trail · 6km · starts 8 a.m.
- 36 km
Oasis ZooRun Toronto 2026
Toronto, ON · Road · 10km / 5km / 1km · starts 8 a.m.
- 36 km
5KM Walk/Run for Thalassemia - Toronto 2026
Toronto, ON · Road · 5km · starts 9 a.m.
- 36 km
Walk for Suicide Awareness 2026
Toronto, ON · Walk · 4km · starts 9 a.m.
- 36 km
Toronto Island Run 2026
Toronto, ON · Road · 10km / 5km / 1mi / 1km · starts 10 a.m.
- 36 km
CCS 5K 2026
Toronto, ON · Road · 5km · starts 12 p.m.
- 36 km
2026 Constantine Yorkville Run
Toronto, ON · Road · 5km · starts 8:30 a.m.
- 36 km
Terry Fox Run — Toronto
Toronto, ON · Road · 5km
87 more — sort everything by distance from you.
5K races in Ajax — FAQ
- How many 5k races are there in Ajax?
- 2 upcoming, and 107 more within 100km if you are willing to drive. The next one is 5k Run To Remember 2026 on Saturday, September 12, 2026. Rebuilt from the race calendar daily.
- When is the next 5k race in Ajax?
- 5k Run To Remember 2026, Saturday, September 12, 2026. Open it for the start time, distances and the official registration link.
- Do I register here?
- No. Every listing links straight to the organizer's own registration page. RaceFinder never takes signups or a cut.
Missing a race? Add it. Or browse every race in Ajax and 5k races across Canada.