Persistence Backyard Ultra 2025

This page is kept as a past race archive for the Aug 2, 2025 edition in Arva, Ontario. See the 2026 edition when you want the live listing. You can also browse the 2025 race calendar.

The Persistence Backyard Ultra is a challenging endurance race held in Arva, Ontario. Participants run a 6.7056 km loop every hour, repeating until only one runner remains, testing stamina and strategy. This event is affiliated with Lazarus Lake's Big Dog's Backyard Ultra and offers competitors a chance to qualify for this prestigious race.

The course features a 3.36 km loop done twice each hour, comprising crushed stone trails, grass, and dirt roads. To promote community and charity, a portion of registration fees supports the Children's Health Foundation. The race is limited to 65 participants to maintain an intimate, competitive atmosphere.

• 3.36 km loop completed twice per hour to meet distance requirement
• Terrain includes crushed stone trails, grassy areas, and dirt roads
• Designed to test endurance and strategy
• Event limits participants to ensure quality experience

• Run a 6.7056 km loop every hour until a single winner remains
• Affiliated with Lazarus Lake's Big Dog's Backyard Ultra
• Course consists of crushed stone trails, grass, and dirt roads
• Participant cap of 65 runners
• Portion of registration fees donated to Children's Health Foundation