2026 Monarch Ultra 10km

Monarch Ultra 10km brings a fall race day to Peterborough on Saturday, September 19, 2026, with Millennium Park as the gathering point. The event pairs a 10K trail race with a 1K Kids Fun Run, making it a family-friendly option as well as a focused run for adults.

The route follows the Rotary Trail in East City beside the Otonabee River, giving the race a local, riverside feel. It sits within a broader running and conservation event that leans community-first rather than purely competitive.

For runners looking to stay connected to the local scene, it also fits neatly into the wider landscape of trail races in Peterborough and 10K races in Peterborough.

The 10K uses an out-and-back route from Millennium Park along the Rotary Trail in East City, beside the Otonabee River. The course is described as relatively flat and fast, with a hydration station at the 5K turnaround. The 10K starts and finishes at Millennium Park.

• 10K trail race in Peterborough on September 19, 2026
• Start and finish at Millennium Park, 130 King Street
• Out-and-back route along the Rotary Trail in East City
• Course follows the Otonabee River
• 1K Kids Fun Run also takes place on race day
• 10K uses chip timing
• Hydration station at the 5K turnaround