What Is a Mini Backyard Ultra, and Is It the Best First Step?

A mini backyard ultra is a shorter, capped version of the backyard format: you still run a loop every hour on the hour, but the event has a fixed finish (for example six, seven or twelve hours) or uses a shorter loop, instead of carrying on until only one runner is left. For lots of people it’s the perfect first step into backyards, though it isn’t quite the same as the real thing.

There’s no official definition of a “mini backyard”, so the term gets used for a few different things in the UK. Here’s what it usually means, some real UK examples, and how to decide whether a mini backyard ultra is right for you.

What is a mini backyard ultra?

First, the full format. Under the official backyard ultra rules, each yard is 4 miles 880 feet (6.7056 km), a new yard starts every hour, and the race is open-ended: the winner is the last person to complete a yard, and everyone else is technically a DNF. There is no finish line.

A mini backyard changes one or both of those things. In the UK you’ll mostly see three types:

1. Time-capped events on a full-length loop

Same loop, same hourly bell, but the event stops after a set number of hours. These usually run alongside a full backyard on the same course. Examples at the time of writing (October 2026):

• Kent Backyard Ultra Series, 7 Hour Challenge: same route, rules and start as the full race, capped at seven yards (just over 29 miles). The organiser describes it as suiting newcomers to the format or anyone wanting a shorter, defined test. The Sholden round is listed for 10 April 2027 on a flat, out-and-back gravel trail near Deal.
• Beacon Hill Backyard, 12 Hour Taster: a 12-hour option alongside the full backyard at Beacon Hill Country Park, Leicestershire, listed for 27 March 2027.
• Suffolk Back Yard Ultra Festival, 6 and 12 Hour Events: in 2026 the festival at High Lodge, Thetford Forest offered a 6 hour event (ages 12 and over) and a 12 hour event alongside the full race. Check the organiser for future editions.

2. Shorter, fun “mini” events

Some races put on a short, relaxed event the evening before the main backyard. The Devon and Cornwall Backyard Ultra, for example, lists a Mini Backyard on Friday 27 August 2027 at Newnham Park, Plympton: 4-mile laps, choose one or two, with crew and doggy categories, raising money for Bowel Cancer West. It’s pitched at people who just want to have a go, which is lovely, but it’s a fun run rather than a test of the backyard format.

3. A DIY mini backyard

The third meaning is the one I know best: your own mini backyard from home. In 2021, before my first ever race, my husband suggested I try a mini backyard to get a taste of it. I ran 12 yards from my front door on roughly 4.1 mile loops, I would DNF myself if I missed the hour, with a kitchen aid station that could have fed a street party. You can read the full story in Backyard Training: My Mini Backyard Challenge.

Completing my first mini backyard ultra really prepared me ahead of my first real race at Faccombe by learning about what kit to wear to keep warm and also how not to overheat. I learned more about the foods that I liked to eat as well as pacing. Things it did not help me prepare for was the race day sounds and camp activities (mainly the whistle!) and also how other people around me can effect me in terms of pacing and listening to / joining in on conversations, either positive or negative.

How a mini backyard differs from a full backyard ultra

That last row is the big one. In a full backyard, the hardest thing is that there is no end in sight. A known finish takes a lot of that pressure away. It’s also worth checking with the organiser whether results from a capped event count towards any backyard rankings, as capped events don’t follow the open-ended format in the standard rules.

A very clear example of this was at Hardwick Hall BYU in September 2025. We were informed after over 30 hours of the race that due to predicted high winds there would be an enforced cut off time of 5am Monday morning, this would equate to 43 yards. I chose to stop as I knew there would be no chance of a PB for me. But before I made that decision, everything felt different as soon as I knew the race would end at 43 hours, everything felt easier.

Is a mini backyard ultra the best first step?

Often, yes, but not always. Here’s my take on the pros and cons:

Pros

• You learn the hourly rhythm: the corral, the bell, the reset, eating every hour.
• You get to practise your camp set-up and crew routine in a real race environment.
• A fixed finish means less pressure and usually less recovery time.
• A 7 hour challenge gives you just over 29 miles, past marathon distance, so it can be your first ultra.

Cons

• You don’t practise the hardest part: deciding to go out again with no end in sight.
• Shorter capped events may finish before dark, so you might not get to practise night yards.
• If you’re feeling great at the cap, you might wish you’d entered the full race!

You might not need a mini backyard if you’ve already run a few ultras and simply want to find out how far you can go. In that case, enter the full race with a sensible goal: you can always stop at 7 or 12 yards, and you’ll still have the option to keep going. A home sim might give you more useful practice than a capped race anyway.

If one of my athletes was asking which version was best for them, I would first look at their outcome goals and ask them what they hoped to achieve, we would then base the decision on those – which race would better support their goals.

Who a mini backyard suits

• Runners stepping up from the marathon who want a supported first ultra.
• People who are nervous about running through the night.
• Crew members who’d like to see the format from the runner’s side.
• Younger runners, where the event allows. The Suffolk 6 hour event was open to ages 12 and over in 2026, while the full events at Suffolk and in the Kent series were 18 and over.
• Experienced runners who want a structured long training day.

Using a mini backyard as a stepping stone or training session

If you treat a mini backyard as practice, go in with a list of things to test. These are the same things I’d test in any sim:

1. Pacing: aim for steady yard times rather than racing. Note your natural time per yard.
2. Run-walk: practise walking the hills and running the rest.
3. Fuelling: eat something every yard, and write down what you fancied and when.
4. The reset: how long does it really take to eat, drink, use the loo and get back to the corral?
5. Kit and temperature: how quickly do you get cold sitting down?
6. Your mind: where do your thoughts go in the later yards?

My own mini backyard taught me some surprising things: I needed to wrap up warm for the walking yards, and (because the loo was right there) I went for a wee after every single lap! It also left my legs feeling it for a couple of days, which I put down to all the pavement. Treat a 7 or 12 hour event as a proper long effort and build in recovery afterwards. My tips for preparing for your first backyard ultra cover what to practise in more detail.

I would usually slot in a mini backyard (up to 12 yards) around at least 5 weeks before a big goal race and support recovery afterwards with rest and lower impact workouts.

Frequently asked questions

How long is a mini backyard ultra?

It depends on the event. Time-capped versions in the UK are commonly 6, 7 or 12 hours, which is 25, 29.2 or 50 miles (40.2, 46.9 or 80.5 km) if you complete every yard.

Is a mini backyard ultra a real ultra?

An ultra is anything longer than a marathon (26.2 miles, 42.2 km). Seven yards or more takes you past that, so a 7 or 12 hour event counts if you finish every yard. Six yards (25 miles) falls just short.

Can I do a mini backyard as my first ever race?

You can if you’re already running regularly and can comfortably cover 4.167 miles in well under an hour. Always check the event’s age and entry rules first.

Ready to step up?

If a mini backyard has given you the bug and you want to train properly for the full format, I can help as your backyard ultra coach. And if the open-ended part is what worries you, my mindset coaching is all about that.

Sources

• Backyard Ultra Rules, Big’s Backyard Ultra
• 2.3 Kent Backyard Ultra Series: Sholden, Hellfire Events
• Beacon Hill Backyard, Time Outdoors
• Suffolk Back Yard Ultra Festival: 6 Hour Event, Time Outdoors
• Suffolk Back Yard Ultra Festival: 12 Hour Event, Time Outdoors
• Devon and Cornwall Mini Backyard Ultra 2027, SiEntries