Maple Leaf Marathon

Registration is open online through RunReg. Entry opens April 1 and closes May 4, 2026 at 5:00 PM ET. There is no lottery; it's first-come, first-served open registration.

Yes, the Maple Leaf Marathon is a Boston qualifier. Keep in mind the course has 800 feet of net elevation gain on a loop, so plan your pacing accordingly.

The time limit is 3.5 hours. This is a firm cutoff that keeps the field competitive, so make sure your training puts you well inside that window before race day.

The course is a loop with 800 feet of net elevation gain. Because it's a loop rather than a point-to-point, the climbing isn't offset by a long net descent, so expect the cumulative effort to build through the second half.

Race day typically sees a low in the low-to-mid 40s and a high around the mid-60s. Mornings can be cold and potentially breezy, so a throwaway layer at the start is a good idea. Conditions generally favor a solid effort once you're moving.

The Maple Leaf Marathon is a small race with around 150 finishers. That means a quiet, focused atmosphere rather than a big-city crowd experience.

Yes, the course is USATF certified, confirming an accurately measured marathon distance.