Photo: Sergey Pesterev · CC BY-SA 4.0 · Wikimedia CommonsRoad Running
Around the Bay Road Race 30K
Hamilton, Canada
April 4, 2027Date confirmed
30 km15 km10 km5 km
City RunSeaside & Coast
CARegional Running Calendar
Running Calendar Races in Ontario: Races, Trails & Competitions
17 verified events (4 confirmed dates) and 75 races in Races in Ontario with course maps and elevation profiles.
Events174 confirmed dates
Competitions75Races & courses
Distances2 - 170.9 kmCourse distance range
Max. Elevation Gain+4,940 m D+Course elevation profile
Selected Events
Featured Events & Highlights
Photo: Sergey Pesterev · CC BY-SA 4.0 · Wikimedia CommonsPhoto: Sergey Pesterev · CC BY-SA 4.0 · Wikimedia CommonsRoad RunningWorld Marathon Majors Qualifier
Ottawa Marathon
Ottawa, Canada
May 29, 2027 to May 30, 2027Date confirmed
42.2 km21.1 km10 km5 km+1
Public ParkForest+6
Photo: Tobias Alt, Tobi 87 · CC BY-SA 4.0 · Wikimedia CommonsRoad RunningWorld Athletics Label
Tcs Toronto Waterfront Marathon
Toronto, Canada
October 16, 2027 to October 17, 2027Date confirmed
42.2 km21.1 km5 km
Culture & HistoryFestive+3
Photo: Sergey Pesterev · CC BY-SA 4.0 · Wikimedia CommonsTrail RunningDuathlon
XTERRA Conquer the Crater
Grand Sudbury, Canada
Date to be announcedDate TBA
42 km36.5 km34.5 km21 km+4
Charity RunNature & Off-Road+3
Photo: Sergey Pesterev · CC BY-SA 4.0 · Wikimedia CommonsTrail RunningUTMB Index Races
Ultra Trail Stokely Creek
Algoma Mills, Canada
Date to be announcedDate TBA
170.9 km85.5 km56.4 km34.4 km+2
MountainHigh Altitude+2
Photo: Dietmar Rabich · CC BY-SA 4.0 · Wikimedia CommonsRoad RunningWalking & HikingWorld Marathon Majors Qualifier
Toronto Marathon
Toronto, Canada
Date to be announcedDate TBA
42.2 km21.1 km10 km5 km
Public ParkLakes & Ponds+4
Photo: Tobias Alt, Tobi 87 · CC BY-SA 4.0 · Wikimedia CommonsRoad RunningWorld Marathon Majors Qualifier
Niagara Falls International Marathon
Niagara Falls, Canada
Date to be announcedDate TBA
42.2 km21.1 km10 km5 km
Public ParkCity Run+4
Photo: Tobias Alt, Tobi 87 · CC BY-SA 4.0 · Wikimedia CommonsRoad RunningWorld Marathon Majors Qualifier
Hamilton Marathon Road2Hope
Hamilton, Canada
Date to be announcedDate TBA
42.2 km21.1 km10 km5 km
Nature & Off-RoadForest+3
Dates & Schedule
Race Calendar
April 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Apr 4, 2027 | Around the Bay Road Race 30K | Hamilton, Ontario, CA | Road Running | 30 km15 km10 km5 km |
May 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| May 29, 2027 - May 30, 2027 | Ottawa Marathon | Ottawa, Ontario, CA | Road Running | 42.2 km21.1 km10 km5 km |
October 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Oct 16, 2027 - Oct 17, 2027 | Tcs Toronto Waterfront Marathon | Toronto, Ontario, CA | Road Running | 42.2 km21.1 km5 km |
Date to be announced
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Date to be announced | XTERRA Conquer the Crater | Grand Sudbury, Ontario, CA | Trail RunningDuathlon | 42 km36.5 km34.5 km21 km |
| Date to be announced | Ultra Trail Stokely Creek | Algoma Mills, Ontario, CA | Trail Running | 170.9 km85.5 km56.4 km34.4 km |
| Date to be announced | Toronto Marathon | Toronto, Ontario, CA | Road RunningWalking & Hiking | 42.2 km21.1 km10 km5 km |
| Date to be announced | Niagara Falls International Marathon | Niagara Falls, Ontario, CA | Road Running | 42.2 km21.1 km10 km5 km |
| Date to be announced | Hamilton Marathon Road2Hope | Hamilton, Ontario, CA | Road Running | 42.2 km21.1 km10 km5 km |
| Date to be announced | Georgina Spring Fling Marathon, 1/2, 10km, 5km | Georgina, Ontario, CA | Road Running | 42.2 km21.1 km10 km5 km |
| Date to be announced | Georgina Marathon | Georgina, Ontario, CA | Road Running | 42.2 km21.1 km10 km5 km |
| Date to be announced | Kakabeka Falls Half Marathon | Kakabeka Falls, Ontario, CA | Road Running | 42.2 km21.1 km8 km |
| Date to be announced | Art In Motion | Vaughan, Ontario, CA | Trail RunningRoad Running | 10 km5 km2 km |
Events by Month
Overview & Route Character
The region of Races in Ontario (Canada, Ontario) is represented in the RunningCompass catalog with 17 public events and 75 individual races, including 4 events with confirmed dates for the 2026-2027 season. Core disciplines include Road Running, Trail Running, and Duathlon. Key host locations include Hamilton, Ottawa, Toronto, and Grand Sudbury. Notable events in the selection include Around the Bay Road Race 30K, Ottawa Marathon, and Tcs Toronto Waterfront Marathon.
Race distances span from 2 km to 170.9 km, reaching up to +4,940 m of elevation gain on the most demanding courses. Every race listed for Races in Ontario includes an interactive MapLibre course map powered by OpenStreetMap, a high-resolution SVG elevation profile with gradient telemetry, and a direct GPX track download.
Questions & Answers
Frequently asked questions (FAQ)
How many running events and races take place in Races in Ontario?
RunningCompass currently lists 17 verified events with 75 individual races in Races in Ontario. A total of 4 events have confirmed upcoming dates, while additional annual editions include full course and distance specifications. Notable events in the selection include Around the Bay Road Race 30K, Ottawa Marathon, and Tcs Toronto Waterfront Marathon.
What disciplines and race distances are offered in Races in Ontario?
Events in Races in Ontario focus on Road Running, Trail Running, and Duathlon. Course distances range from 2 km entry-level races up to 170.9 km endurance challenges. Primary host cities and towns include Hamilton, Ottawa, Toronto, and Grand Sudbury.
What is the course profile, terrain, and elevation gain like in Races in Ontario?
The most selective courses in Races in Ontario climb up to +4,940 m of positive elevation gain. Each event page provides exact altitude range, ascent (+m), descent (-m), average and maximum gradient, an interactive course map, and a downloadable GPX file.
How can I find dates and register for running events in Races in Ontario?
The monthly race calendar on this page groups all confirmed dates chronologically alongside annual events awaiting their next date announcement. Use the discipline, distance, and month links or switch to the interactive map view (/en/events?view=map) to inspect individual event profiles and official organizer registration links.