Backyard ultra in Cáceres
2 verified races in the province of Cáceres, in Almaraz. 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: Backyard Ultra Almaraz Energía Infinita (Almaraz) and Ibérica Backyard Ultra Masters (Almaraz).
The next one is Backyard Ultra Almaraz Energía Infinita, in Almaraz, on 14 NOV 2026, 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 province is 40 loops (268.2 km), by Jose Carlos Alcazar Garcia in Ibérica Backyard Ultra Masters 2025. It is the only edition with results in the archive.
Frequently asked questions
How many backyard ultras are there in Cáceres?
Our archive holds 2 verified races in the province of Cáceres, spread across Almaraz. 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 Cáceres?
The soonest of those with a confirmed edition is Backyard Ultra Almaraz Energía Infinita, in Almaraz, on 14 NOV 2026. 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 provinces
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.