The Mad Trapper Backyard Ultra is an endurance trail race held at The Ark, approximately 40 minutes north of Ottawa, in Denholm, Quebec. Participants run a looped trail course every hour, on the hour, until only one runner remains. The race offers several formats including the classic individual "Last Person Standing" on a full loop of roughly 5.5 to 6.0 km, the slightly shorter Kristi Loop (~5.2 km), and a unique 2-person team format.

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Known for its technical and hilly terrain with alternating loop directions each hour, this race tests mental grit and physical endurance. The event includes a post-race celebration, with a buffet provided and space for crews and camping nearby.

* Classic Individual Last Person Standing event on Full Loop (~5.5 to 6.0 km per loop) * Individual Kristi Loop Last Person Standing option (~5.2 km per loop) * 2-Person Team event uses Kristi Loop (~5.2 km per loop) * All races start at 8:00 AM on June 21, 2025 * Trail surface with technical and hilly terrain * Loops alternate direction each hour * Personal aid required; water and food provided * Strollers not allowed

• Held at The Ark, 285 ch. de Farrellton, Denholm, QC, about 40 minutes north of Ottawa
• Choose between Full Loop (~5.5-6.0 km) and Kristi Loop (~5.2 km)
• Unique 2-Person Team Backyard Ultra format
• Technical, hilly trail terrain with alternating loop directions
• Post-race buffet celebration
• Space for crews, lawn chairs, coolers, and tent camping nearby
• Participant cap of 60 racers with early notifications to past participants