5K races in Ajax
1 upcoming in Ajax, and 91 more within 100km. Every one links to the organizer's official registration page.
More 5k races near Ajax
Everything within 100km, sorted by how far you would have to drive.
- Sunday, October 4, 20267 km
Run for Durham 2026Price ends soon
Whitby, ON · Road · 5km / 3km / 1km · starts 9 a.m. · from $25
- Saturday, December 5, 20267 km
2026 Santa Shuffle Whitby: Fun Run & Elf Walk
Whitby, ON · Road · 5km · starts 10 a.m. · from $62
- Sunday, January 10, 20277 km
Running Room New Year's Run - Whitby
Whitby, ON · Road · 5km / 1km · starts 10 a.m. · from $13
- Saturday, June 19, 20277 km
Shoppers Drug Mart® Run for Women - Whitby 2027
Whitby, ON · Road · 10km / 5km / 1km · starts 8:30 a.m.
- Sunday, October 4, 202614 km
CIBC Run for the Cure — Durham Region
Oshawa, ON · Road · 5km / 1km · starts 10 a.m.
- Saturday, June 5, 202721 km
2027 Scarborough 5K
Scarborough, ON · Road · 5km / 1km · starts 10 a.m.
- Sunday, June 20, 202723 km
Stouffville Main Street 5K
Whitchurch-Stouffville, ON · Road · 5km / 1km · starts 8 a.m. · from $57
- Saturday, October 3, 202625 km
PHM Run for the Residents
Markham, ON · Road · 21km / 6km · starts 8 a.m.
- Saturday, October 3, 202625 km
Run for Markham 2026
Markham, ON · Road · 5km / 3km / 1km · starts 9 a.m. · from $24
- Sunday, May 23, 202725 km
Shoppers Drug Mart® Run for Women - Markham 2027
Markham, ON · Road · 10km / 5km / 1km · starts 9 a.m.
- Saturday, June 19, 202730 km
The Whole Enchilada
Uxbridge, ON · Trail · 50km / 25km / 8km / 4km · starts 7:30 a.m. · from $47
- Sunday, October 4, 202634 km
CIBC Run for the Cure — Richmond Hill-Markham
Richmond Hill, ON · Road · 5km / 1km · starts 10 a.m.
- Saturday, October 3, 202636 km
PUMA Toronto Women's Fall 8K/5K
Toronto, ON · Road · 8km / 5km · starts 9 a.m.
- Saturday, October 3, 202636 km
West Rouge Sports & Recreation Association Fun Run - 2026
Toronto, ON · Road · 10km / 5km · starts 9:15 a.m. · from $51
- Sunday, October 4, 202636 km
Bimbo Global RacePrice ends soon
Toronto, ON · Road · 10km / 5km / 3km · starts 7 a.m. · from $25
- Sunday, October 4, 202636 km
CIBC Run for the Cure — Toronto
Toronto, ON · Road · 5km / 1km · starts 10 a.m.
- Monday, October 12, 202636 km
Proving Ground: Turkey Time Trial
Toronto, ON · Road · 3km · starts 9 a.m. · from $24
- Saturday, October 17, 202636 km
Cross the Line 2026
Toronto, ON · Road · 5km / 3km · starts 10 a.m. · from $40
- Sunday, October 18, 202636 km
2026 TCS Toronto Waterfront Marathon
Toronto, ON · Road · 42km / 21km / 5km / 1km · starts 8 a.m.
- Sunday, October 18, 202636 km
Run for Toronto 2026Price ends soon
Toronto, ON · Road · 5km / 3km / 1km · starts 9 a.m. · from $24
71 more — sort everything by distance from you.
New races in Ajax, once a month
Newly listed races, and the registrations closing in the next three weeks. One email a month, one click to leave.
5K races in Ajax — FAQ
- How many 5k races are there in Ajax?
- 1 upcoming, and 91 more within 100km if you are willing to drive. The next one is Ajax Waterfront Race on Sunday, October 4, 2026. Rebuilt from the race calendar daily.
- When is the next 5k race in Ajax?
- Ajax Waterfront Race, Sunday, October 4, 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.
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