Backyard ultra in the Basque Country
2 verified races in the Basque Country, across 2 provinces: Bizkaia (1) and Gipuzkoa (1). A backyard ultra is run in 6.71 km loops, one every hour on the hour, until only one runner is left standing.
The races: Euskal Backyard Ultra (Loiu) and Ibai-Ondo Backyard (Usurbil).
The next one is Ibai-Ondo Backyard, in Usurbil, on 20 MAR 2027, and there are 2 with a confirmed date in total. You register on each organiser’s website, never here.
The best mark we hold in the Basque Country is 41 loops (274.9 km), by José Manuel Ruíz Verdugo in Euskal Backyard Ultra 2025. We hold the results of 3 editions in the Basque Country.
Frequently asked questions
How many backyard ultras are there in the Basque Country?
Our archive holds 2 verified races in the Basque Country, spread across 2 provinces (Bizkaia, 1; Gipuzkoa, 1). There is no official census of the Spanish calendar, so this is what we have checked one by one with the organiser or the official timing: if you know one that is missing, you can suggest it and we’ll add it once we’ve checked it.
When is the next backyard in the Basque Country?
The soonest of those with a confirmed edition is Ibai-Ondo Backyard, in Usurbil, on 20 MAR 2027. Each race’s page has its official website, the registration status and the closing date, which is where they are kept up to date.
What exactly is a backyard ultra?
A last one standing race: everyone sets off together to complete a 6.71 km loop within an hour and, at the top of the next hour, sets off again. The last one still standing wins and everyone else is listed as DNF, so there is no target time and no distance set in advance: 24 loops make 100 miles.
Backyards in other communities
To sign up for one, the race calendar lists by date the ones with a confirmed next edition across the country; and if it’s your first one,how to choose and prepare for your backyard goes over what to check before you sign up.