As the official Leinster Backyard Ultra in the All Ireland BYU Championship for 2026, the Dublin Mountain Backyard Ultra turns the Dublin Mountains into a last-one-standing arena. Runners complete a 6.706 km trail loop within 60 minutes and must be back on the start line at the top of each hour to head out again—no set finish distance, no time limit, just repeat laps until everyone but one has timed out or stepped off the course. The loop blends forest tracks, rolling climbs and descents, and classic Irish hill scenery, demanding not only physical endurance but also strategy, pacing and mental resilience through day, dusk, night and (maybe) back to day. With a small-field, community feel and the simple rhythm of “one more lap”, it’s an ideal testpiece for backyard-format devotees and ambitious ultra runners alike in the Dublin hills.
Race
On Saturday, 9 May 2026 at 12:00, the Dublin Mountain Backyard Ultra—better known as Barry & John’s Dublin Mountain Backyard Ultra—takes place in the Dublin Mountains around Ballinascorney/Glencullen, Co. Dublin, Ireland, organised by the Dublin Mountain Running Club. Run in classic backyard format, athletes have one hour to complete each 6.706 km trail loop on repeat until only one runner remains “last one standing,” making this the official Leinster Backyard Ultra qualifier for the All-Ireland BYU Championship.
Weather based on historical averages.
FAQs
What is the Dublin Mountain Backyard Ultra?
How long is the Dublin Mountain Backyard Ultra?
Where does the Dublin Mountain Backyard Ultra take place?
What is the elevation gain of the Dublin Mountain Backyard Ultra?
How can I prepare for the Dublin Mountain Backyard Ultra?
How do I choose the right training plan for the Dublin Mountain Backyard Ultra?
On Saturday, 9 May 2026 at 12:00, the Dublin Mountain Backyard Ultra—better known as Barry & John’s Dublin Mountain Backyard Ultra—takes place in the Dublin Mountains around Ballinascorney/Glencullen, Co. Dublin, Ireland, organised by the Dublin Mountain Running Club. Run in classic backyard format, athletes have one hour to complete each 6.706 km trail loop on repeat until only one runner remains “last one standing,” making this the official Leinster Backyard Ultra qualifier for the All-Ireland BYU Championship.
The Dublin Mountain Backyard Ultra is 6km long.
The Dublin Mountain Backyard Ultra takes place in Dublin, Ireland.
Runna classifies the Dublin Mountain Backyard Ultra elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Dublin Mountain Backyard Ultra?
On Saturday, 9 May 2026 at 12:00, the Dublin Mountain Backyard Ultra—better known as Barry & John’s Dublin Mountain Backyard Ultra—takes place in the Dublin Mountains around Ballinascorney/Glencullen, Co. Dublin, Ireland, organised by the Dublin Mountain Running Club. Run in classic backyard format, athletes have one hour to complete each 6.706 km trail loop on repeat until only one runner remains “last one standing,” making this the official Leinster Backyard Ultra qualifier for the All-Ireland BYU Championship.
How long is the Dublin Mountain Backyard Ultra?
The Dublin Mountain Backyard Ultra is 6km long.
Where does the Dublin Mountain Backyard Ultra take place?
The Dublin Mountain Backyard Ultra takes place in Dublin, Ireland.
What is the elevation gain of the Dublin Mountain Backyard Ultra?
Runna classifies the Dublin Mountain Backyard Ultra elevation profile as Rolling.
How can I prepare for the Dublin Mountain Backyard Ultra?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Dublin Mountain Backyard Ultra?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Dublin Mountain Backyard Ultra or Dublin Mountain Running Club. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Dublin Mountain Backyard Ultra website.