What is a Backyard Ultra?
A Backyard Ultra (also known as “Last One Standing”) is a unique endurance running format. Runners complete a 6.7km (4.167 mile) loop every hour, on the hour. You must finish each loop within the hour to be allowed to continue to the next one. The event continues until only one runner remains who completes a loop on their own.
Is this Backyard Ultra suitable for beginners?
Yes — absolutely. While some runners will aim to go deep into the event, many participants come with the goal of completing just a few loops. The Backyard Ultra format is uniquely beginner-friendly because you choose when to stop. There is no minimum distance requirement beyond completing a single loop, and no pressure to continue beyond what feels right for you.
Is this an official Backyard Ultra event?
Yes. This event follows the official Backyard Ultra (Last One Standing) format: a 6.7km loop, run every hour on the hour, until one runner remains. Timing, distances, and rules align with the internationally recognised Backyard Ultra standard.
Where is the event held?
The event takes place at Blaise Castle Estate in Bristol, South West England. The estate offers a rugged, scenic setting, combining woodland trails, open fields, punchy climbs, and runnable sections with plenty of character.
What is the course like?
This is a gritty trail Backyard Ultra with proper terrain underfoot. Expect hills, roots, rocks, mud, woodland trails and changing conditions throughout the weekend. It’s runnable, welcoming and hugely rewarding — but it is not designed to be flat or fast.
Do I have to keep running until there is one person left?
No. You are free to stop after any completed loop. Many runners treat a Backyard Ultra as a personal challenge rather than a competition. Once you decide to stop, your result is recorded as the number of full loops completed.
Is this a competitive race?
While there is technically one winner, the event is community-focused and runner-led. The atmosphere is supportive rather than aggressive, with runners encouraging each other as the hours pass. Many participants value the shared experience as much as the physical challenge.
What kind of runners take part?
Backyard Ultras attract a wide range of runners — from those new to ultra-distance running, to experienced endurance athletes aiming for long distances. You do not need to be an elite runner to take part; pacing, patience, and consistency matter far more than speed.
Is there a time limit?
There is no fixed time limit. The event continues until only one runner completes a solo loop. Some runners may finish within a few hours, while others may continue overnight and beyond.
Is this event compliant with UK Athletics rules?
Yes. The 2026 event was licensed by the TRA and followed UK Athletics rules for trail running.
What is the minimum age?
As the event complies with UK Athletics rules for trail running, participants must be 20 or older on the day of the event.
How do I hear about the next event?
Join the 2027 waitlist for early access to Bristol Backyard Ultra entries and future Gravel & Grit trail events.
