Bakgarður Náttúruhlaupa Heiðmörk

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Bakgarður Náttúruhlaupa - Heiðmörk
The Iceland Backyard Ultra (Bakgarður Náttúruhlaupa) will take place September 16th 2023.

The Iceland Backyard Ultra follows the conventional rules of Backyard Ultras: (
A new loop of 6.7 km starts every hour on the hour. It's crucial that all who intend to continue with the next loop are at the starting line when the final bell rings. The participant that runs most loops and finishes the last loop by himself, is the winner. Everybody else gets a DNF!

What is a Backyard Ultra?
Backyards are a special kind of ultra runs where participants need to finish running 6706 meters (4,167 miles) within the hour. Each loop starts at the hour and after the runners finish a loop they can use the remaining time to rest and prepare for the next loop. The winner is the last person to complete a loop. If no runner can complete one more loop than anyone else, there is no winner.

The total distance for a runner that finishes 24 loops (24 hours) is 100 miles (160.8 km).

Facebook site:
Location: Elliðavatnsbær, Heiðmörk (close to Reykjvík)
Time: Starts at 9:00 AM, Saturday September 21st, 2024
The trail: 6,7 km loop in Heiðmörk, starts and ends at Elliðavatnsbær
Distance: As many loops as you can handle!
Time limit: Participants have to finish each 6.7 km loop within an hour. There are no further time limits.
Final Results: All participants in the Iceland Backyard Ultra will receive a certificate with their loops and final distance registered as well as a participant medal. The winner of the Iceland Backyard Ultra will be uniquely rewarded!

Full price: 13.900 kr.
Registration fee will not be refunded but runners can change the name of their registration until 8th of September.
After 8th of September there is 2000 kr. extra fee for a name change. 
From 16.-18. of September there is 2900 kr. extra fee for a name change. 
For name changes after 8th of September please e-mail: 

What is included?
Running bib and time registration
Aid station with plenty of food as long as someone is still in the race

Organizers: Náttúruhlaup and Arctic Running
Náttúruhlaup (Nature Running) is the the local branch of Arctic Running. While Arctic Running offer Running Tours in Iceland for visitors, Náttúruhlaup is a running community for local runners. Arctic Running/Náttúruhlaup held the Iceland Backyard Ultra for the first time in September 2020. It sold out quickly and was a huge success. We look forward to receiving you!

For more information send email to

Contestant information