Okavango Marathon Project presents
A Backyard Ultra is the purest test in endurance sport. Every hour, on the hour, you run a “yard” — exactly 6.706 km (4.167 miles). Everyone starts together. The last runner still going wins. Not the fastest. The last one.
There’s no finish line. No cut-off. No podium for second place. You either complete the yard within the hour — and toe the line for the next — or your race is over. The winner is determined only when every other runner has stopped.
A new yard starts at the top of every hour. You control how long your rest window is — but the clock waits for no one.
Exactly one quarter marathon, every loop. Each yard brings you back to camp — and to the next decision: in or out?
There's exactly one winner: the last person to complete a yard. Everyone else — no matter how far they ran — gets a DNF.
Between yards, runners share camp, food, and stories. This event is as much about people as it is about distance.
The Backyard Ultra was invented by Gary “Lazarus Lake” Cantrell in 2011 in Bell Buckle, Tennessee. Since then the format has spread to every continent — and the records have pushed the absolute limits of human endurance.
That’s the thing about the Backyard format — it’s uniquely inclusive. A 100-mile veteran and a first-time trail runner can toe the same start line, and both will have a meaningful, memorable experience. You set your own goal. The event meets you where you are.
1–3 YARDS · 6–20 KM
4–12 YARDS · 27–80 KM
12+ YARDS · 80 KM+
your yards for the team ranking
We will send you an email with our account details when we have received your registration.
Full entry details, entry fee, and payment instructions will follow by email. This registration secures your interest and puts you first in line for venue confirmation.
The Sitatunga Camp is just 14km out of Maun on the road to Ghanzi. A peaceful place and perfect for a day of running.
The rules of a backyard ultra are applied consistently in all races around the world. These rules are very simple, and have been set to ensure that all runners that may qualify for championships have qualified in similar circumstances.
These rules are non-negotiable, and not even the Race Director can over-rule them.
The Backyard Ultra format is built around one simple rule: every runner starts a new yard exactly on the hour. Managing your pacing, recovery, nutrition, and time between yards is all part of the challenge.
More detailed information about the official Backyard Ultra format and rules can be found on the Big’s Backyard Ultra website: https://bigsbackyardultra.com/rules/
The Backyard Ultra format is intentionally simple, fair, and self-sufficient. The following rules are in place to ensure equal conditions for all participants and to maintain the spirit of the event.
The Backyard Ultra format has a unique approach to results and finishing. The event continues until only one runner is able to complete a yard alone within the required time limit.
In a Backyard Ultra, the focus is not only on winning, but on pushing personal limits, supporting fellow runners, and seeing how far you can go beyond what you originally thought possible.
Personal gear depends on your personal goals. If you only want to run 1 or 2 yards during the day, you won’t need most of the recommended gear.
Lighting: A reliable head torch/headlamp with spare batteries or a backup light is essential for the night hours. Even experienced runners underestimate how mentally challenging the night section can become after several yards.
Clothing: Depending on how many yards you plan to run, bring enough changes of socks and dry shirts. Temperatures can drop significantly during the night and early morning hours, especially once you stop moving between yards. Warm layers such as a jacket, beanie, long pants, a warm blanket, or even a sleeping bag are highly recommended to help maintain your core temperature and recover between loops.
Footwear: Lightweight trail running shoes are generally recommended, especially if conditions become sandy or uneven. However, most runners can comfortably complete the BYU in their normal road running shoes as well. Having a second pair of shoes available can also be helpful during longer efforts or wet conditions.
Nutrition & Hydration: A hydration vest, handheld bottles, or an easily accessible personal hydration setup is strongly recommended, together with a wide variety of nutrition options, electrolytes, recovery snacks, and morale-boosting comfort food. Backyard Ultras are self-sufficient events, and each participant is fully responsible for their own hydration, nutrition, and recovery before, during, and after each yard.
Because runners return to the same basecamp area after every yard, having a comfortable and practical setup can make a big difference throughout the event. Especially when you want to run a longer distance or when you want to stay longer as a spectator.
The Backyard Ultra is officially an individual event where every runner competes against themselves, the clock, and the remaining runners. However, to make the event even more social and fun, we also offer an unofficial Team / Club Challenge.
Whether you come with a running club, a group of friends, colleagues, or just want some extra motivation around camp — the Team / Club Challenge adds another fun layer to the Backyard Ultra experience.
An Okavango Marathon Project event. Brought to you by Chopbe Impact and Outdoor Adventures BW.