One 4.167-mile yard. Every hour. Until one remains.
Miami Backyard Ultra starts December 19, 2026 at 8:00 AM EST at Miami Marine Stadium / Virginia Key. The field is limited to 500 runners.
Maybe it is two yards. Maybe four. Farther than you have ever gone. Through the night. Fifty miles. One hundred. The final yard. Everyone starts the same yard under the same rules.
Complete each yard in less than one hour, recover in the time left, then start with the field at the next hourly bell. There are no late starts, skipped yards, pacers or personal aid during a yard. One runner must complete one more yard than everyone else to win. All other runners technically record a DNF, with completed yards as their official result.
Parking, packet pickup, basecamp, crew access and aid procedures will be published in the Athlete Guide before race weekend. Participant award details coming soon.
Dec 19, 2026
Distance — Backyard Ultra
Type — Running
08:00
$249.00
Learn more about the host city, Key Biscayne.
Key Biscayne is a village in Miami-Dade County, Florida, United States. Located on the island of Key Biscayne, the village is part of the Miami metropolitan area of South Florida. The population was 14,809 at the 2020 census, up from 12,344 in 2010.
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location_on Key Biscayne, Florida, US
calendar_today Oct 10, 2026
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