Monarch Ultra
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Monarch Ultra 10km - Peterborough, ON
The Monarch Ultra 10km is part of the Monarch Festival & Race taking place at Millennium Park in downtown Peterborough on September 19, 2026. The event combines a road/trail race with a festival that focuses on monarch butterfly conservation, education, and community activities.
Distances offered:
- 10 km
- 1 km Kids Fun Run
The 10 km is an out-and-back route along the Rotary Trail and Trans Canada Trail beside the Otonabee River. The course is described as relatively flat and fast. A water station is located at the 5 km turnaround; this is a cup-free event, so participants must bring their own bottle or handheld vessel. The 10 km race is chip timed. Monarch-themed costumes are encouraged and prizes are awarded for best costumes and for the top three finishers in male and female categories.
The 1 km Kids Fun Run is for children under 13, limited to 50 participants, and starts and finishes at Millennium Park. Each child receives a hand-painted medal and a snack at the finish.
Registration includes a race bib, a monarch-inspired neck gaiter for 10 km finishers, milkweed seeds, chip timing for the 10 km, post-race treats and refreshments, and access to the festival and post-race gathering. The festival features live music, local crafts, face painting, informative booths, guest speakers, and food. Visit the organization's website for the most recent information.
