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4 Fore 30 Infinity Backyard Ultra

Name: 4 Fore 30 Infinity Backyard Ultra
Start: 2025-11-15
End: 2025-11-15
Location: Macks Creek

Macks Creek, United States • 15 Nov 2025

The 4 Fore 30 Infinity Backyard Ultra is an annual endurance running event held in Macks Creek, Missouri, now in its eighth year. Participants run a 4.1667-mile course every hour, starting at 7:00 AM, with the goal of being the last person to complete a loop. The race continues until only one runner remains able to finish each hour within the time limit.

The event follows the rules of Big's Backyard Ultra, emphasizing self-paced running and strategic pacing. All runners receive race swag, and proceeds benefit the Kids' Harbor Child Advocacy Center. The race features aid stations, optional lighting, and accommodations nearby. Visit the organization's website for the most recent information.

United States Missouri Macks Creek

Race information

Website Registration

4 mi

4.1667 Miles

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday Aug 30

Leaky Hourglass Ultra

Halfway - 28 mi from Macks Creek

Backyard Ultra

4 mi

The Leaky Hourglass Ultra is a unique Last Man Standing running event held in Half Way, Missouri. Participants race on a rural highway course with rolling hills, completing laps of approximately 4.167 miles. The challenge involves a decreasing time limit for each lap, starting with 60 minutes and lo..