Organized by GB Ultras, the Yr Wyddfa Ultra 100 Mile challenges participants with a demanding course that includes 10 checkpoints across Snowdonia National Park. Runners must have prior ultramarathon and mountain experience to qualify, ensuring they are prepared for the event's rigorous demands. The race is self-navigated, requiring proficiency in map reading, and features live online GPS tracking for real-time monitoring. Finishers are rewarded with bespoke GB Ultras buckles, with gold, silver, and bronze distinctions based on their placement, and additional trophies are awarded to the top three male and female finishers.
Races
100 Mijl
50 Meile
The Yr Wyddfa Ultra 100 Mile, scheduled for September 6, 2025, is a formidable race through the majestic landscapes of Snowdonia National Park, boasting an elevation gain of 5,788 meters. Organized by GB Ultras, this race challenges runners to conquer some of Wales' most iconic peaks, including the summit of Yr Wyddfa (Snowdon), in one of the toughest ultra-marathons in the UK.
On September 6, 2025, the Yr Wyddfa Ultra 100 Mile invites you to test your endurance against 5,788 meters of rugged elevation across the dramatic landscapes of Snowdonia. Crafted by GB Ultras, this race is more than a challenge—it's a journey through the heart of Wales, taking you over iconic peaks, including the legendary Yr Wyddfa (Snowdon).
Weather based on historical averages.
FAQs
What is the Yr Wyddfa Ultra 100 Mile?
How long is the Yr Wyddfa Ultra 100 Mile?
Where does the Yr Wyddfa Ultra 100 Mile take place?
What is the elevation gain of the Yr Wyddfa Ultra 100 Mile?
How can I prepare for the Yr Wyddfa Ultra 100 Mile?
How do I choose the right training plan for the Yr Wyddfa Ultra 100 Mile?
The Yr Wyddfa Ultra 100 Mile, scheduled for September 6, 2025, is a formidable race through the majestic landscapes of Snowdonia National Park, boasting an elevation gain of 5,788 meters. Organized by GB Ultras, this race challenges runners to conquer some of Wales' most iconic peaks, including the summit of Yr Wyddfa (Snowdon), in one of the toughest ultra-marathons in the UK.
The Yr Wyddfa Ultra 100 Mile is 161km long.
The Yr Wyddfa Ultra 100 Mile takes place in Betws-y-Coed, Wales, UK.
The Yr Wyddfa Ultra 100 Mile elevation gain is 5788 metres, which Runna classifies as a Hilly race.
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 Yr Wyddfa Ultra 100 Mile?
The Yr Wyddfa Ultra 100 Mile, scheduled for September 6, 2025, is a formidable race through the majestic landscapes of Snowdonia National Park, boasting an elevation gain of 5,788 meters. Organized by GB Ultras, this race challenges runners to conquer some of Wales' most iconic peaks, including the summit of Yr Wyddfa (Snowdon), in one of the toughest ultra-marathons in the UK.
How long is the Yr Wyddfa Ultra 100 Mile?
The Yr Wyddfa Ultra 100 Mile is 161km long.
Where does the Yr Wyddfa Ultra 100 Mile take place?
The Yr Wyddfa Ultra 100 Mile takes place in Betws-y-Coed, Wales, UK.
What is the elevation gain of the Yr Wyddfa Ultra 100 Mile?
The Yr Wyddfa Ultra 100 Mile elevation gain is 5788 metres, which Runna classifies as a Hilly race.
How can I prepare for the Yr Wyddfa Ultra 100 Mile?
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 Yr Wyddfa Ultra 100 Mile?
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 Yr Wyddfa Ultra 50 Mile?
How long is the Yr Wyddfa Ultra 50 Mile?
Where does the Yr Wyddfa Ultra 50 Mile take place?
What is the elevation gain of the Yr Wyddfa Ultra 50 Mile?
How can I prepare for the Yr Wyddfa Ultra 50 Mile?
How do I choose the right training plan for the Yr Wyddfa Ultra 50 Mile?
On September 6, 2025, the Yr Wyddfa Ultra 100 Mile invites you to test your endurance against 5,788 meters of rugged elevation across the dramatic landscapes of Snowdonia. Crafted by GB Ultras, this race is more than a challenge—it's a journey through the heart of Wales, taking you over iconic peaks, including the legendary Yr Wyddfa (Snowdon).
The Yr Wyddfa Ultra 50 Mile is 80km long.
The Yr Wyddfa Ultra 50 Mile takes place in Betws-y-Coed, Wales, UK.
The Yr Wyddfa Ultra 50 Mile elevation gain is 3254 metres, which Runna classifies as a Hilly race.
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 Yr Wyddfa Ultra 50 Mile?
On September 6, 2025, the Yr Wyddfa Ultra 100 Mile invites you to test your endurance against 5,788 meters of rugged elevation across the dramatic landscapes of Snowdonia. Crafted by GB Ultras, this race is more than a challenge—it's a journey through the heart of Wales, taking you over iconic peaks, including the legendary Yr Wyddfa (Snowdon).
How long is the Yr Wyddfa Ultra 50 Mile?
The Yr Wyddfa Ultra 50 Mile is 80km long.
Where does the Yr Wyddfa Ultra 50 Mile take place?
The Yr Wyddfa Ultra 50 Mile takes place in Betws-y-Coed, Wales, UK.
What is the elevation gain of the Yr Wyddfa Ultra 50 Mile?
The Yr Wyddfa Ultra 50 Mile elevation gain is 3254 metres, which Runna classifies as a Hilly race.
How can I prepare for the Yr Wyddfa Ultra 50 Mile?
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 Yr Wyddfa Ultra 50 Mile?
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!
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Sport:
Running
Tags:
Night Run
Altitude
Nature
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Yr Wyddfa Ultra 100 Mile or GB Ultras. 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 Yr Wyddfa Ultra 100 Mile website.
