Endless Day Backyard Ultra

Endless Day Backyard Ultra : Richfield, UT, June 27, 2026

The Endless Day Backyard Ultra is a looped endurance event held at Nielson Family Park (555 N 600 E) in Richfield, Utah. The event offers multiple distance milestones and a backyard ultra format on flat dirt farm roads with wide open skies and views of the Pahvant Range and Red Hills.

Distances offered:

• 10K
• Half Marathon
• Marathon
• 50K
• 50 Miles
• ~100 Miles

Participants run a 6.55 mile loop that begins every 90 minutes. Runners must complete each lap within 90 minutes and may stop when they wish; the event continues for up to 24 hours. Milestone mapping is provided so a specific number of laps corresponds to standard race distances, for example 1 lap equals 10K and about 15 laps equals roughly 100 miles. The overall winner is the runner who goes the furthest within the time limits; if multiple runners finish the last lap, the first to finish that lap is the winner.

Course and support details note mostly dirt roads with only three city blocks of pavement, minimal shade, and likely sunny dry conditions near the summer solstice. Aid is available at a full start/finish station called The Oasis, a halfway aid station, and additional self serve coolers. Nielson Family Park provides room for personal base camps. Finishers receive a milestone memento and a race hat.

Registration is tiered by intended laps: 1 to 6 laps $65 regular right up to $85 after June 20; 7 to 15 laps $90 regular up to $110 after June 20. Registration closes Wed, Jun 24 at 11:59 PM MT. Visit the organization's website for the most recent information.