Backyard Ultra Marathon
The Tidal Force Backyard Ultra is far from your typical backyard ultra, it's an experience shaped by nature itself.
Each 6.7 km loop winds along the stunning Petitcodiac riverside trail. Where twice a day, a tidal bore surges upriver, cutting directly through the course and transforming every lap into more than just distance, but a race in rhythm with the river.
Whether you're a seasoned ultra runner chasing 100 kilometers or a first-timer curious to see if you can conquer a single lap, this course welcomes all.
Course Map
Start & Finish Locations
All races begin beneath the Gunningsville Bridge on the Riverfront Trail, marked by the green flag on the map. This scenic riverside path follows the Petitcodiac River, offering an incredible front-row view of the approaching tidal bore.