About this event
Smurf’s Backyard Ultra is a timed endurance challenge held at Smithfield Mountain Bike Park in tropical Far North Queensland. Runners complete a 6.7-kilometre loop through the Smithfield mountain bike trails, with each lap starting on the hour, every hour.
The event continues until only one runner remains. Success depends on pacing, recovery and mental resilience, as participants must complete each loop within the hourly time limit before lining up for the next start.
For those who want to experience the backyard-ultra format without committing to an open-ended endurance challenge, the Mini Backyard option allows participants to complete up to six laps.
The event also features a Saturday-night celebration with food, drinks, a bar and live music, creating a social atmosphere alongside the trail-running challenge.
- Date: Saturday, 24 October 2026
- Location: Smithfield Mountain Bike Park, Smithfield, Queensland
- Format: 6.7-kilometre loop starting every hour
- Endurance event: Continues until one runner remains
- Mini option: Up to six laps
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