Persistence Backyard Ultra

Arva, Canada • 1 Aug 2026

Persistence Backyard Ultra

The Persistence Backyard Ultra is an officially affiliated race of Lazarus Lake's Big Dog's Backyard Ultra. Held at the Eco Park in Arva, Ontario, just outside of London, this event is a "Last One Standing" competition designed to test physical and mental endurance.

The course features a specific format where runners must complete 6.7056 km every hour. This is achieved by finishing two consecutive laps of a smaller 3.36 km circuit within the sixty-minute window. The terrain consists of crushed stone trails, grass, and a dirt road, making it a very runnable surface. Participants remain close to the Race HQ throughout the loop.

As a Silver Ticket event, the winner receives automatic entry into the World Team Championship. The event is sanctioned by Athletics Ontario and supports the Children's Health Foundation through registration donations.

Event features and regulations: Visit the organization's website for the most recent information.

  • Participation is capped at 67 runners.
  • No spectators are allowed on-site due to safety and space considerations.
  • Runners are limited to two crew members at the start of the event.
  • Participants must provide all their own food and hydration, as there is no potable water on-site.
  • Headlamps or equivalent lighting gear are required for participants running after dark.
  • A commemorative hoodie is provided to each registered participant.

Race information

7 km
Backyard Ultra Loop
Visit the organization's website for the most recent information.
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