Keji's Backyard Ultra is a unique endurance event held annually at Kejimkujik National Park and National Historic Site in Nova Scotia, Canada. The 2026 edition, scheduled for June 6, continues the tradition of the backyard ultra format, where runners must complete a 6.67 km loop every hour, on the hour, until only one participant remains. This format tests not only physical endurance but also mental resilience, as the race can last for dozens of hours.

Since its inception in 2022, Keji's Backyard Ultra has grown in popularity, attracting ultra runners from across Canada and beyond. The event is known for its supportive atmosphere, beautiful natural setting, and challenging yet accessible course. With amenities such as nearby bathrooms, showers, and a beach, participants and their crews can focus on the race while enjoying the scenic surroundings of Kejimkujik National Park. The event also offers significant prize money, making it a competitive and rewarding experience for top finishers.

The course consists of a non-technical gravel single track with approximately 30 meters of elevation gain per 6.67 km loop. The route is an out-and-back along the Mersey River, offering ample shade and scenic views of the park's natural beauty. The terrain is suitable for both experienced ultra runners and those new to the backyard format, with a surface that is forgiving and well-maintained. The proximity to park amenities ensures runners have access to essential facilities throughout the event.

- **Backyard Ultra Format:** 6.67 km loop every hour until only one runner remains
- **Prize Money:** $2,000 for the winner, $1,000 for the assist, $500 for top female
- **Participant Limit:** 150 runners
- **Current Record:** 54 loops (Lee Murphy)
- **Amenities:** Bathrooms, showers, and beach access nearby
- **Scenic Course:** Shaded route along the Mersey River in Kejimkujik National Park