The Great Welsh Marathon includes a marathon, half marathon, and 10km race, showcasing the best of coast and country with a flat and friendly route ideal for personal bests and first-timers. Participants will enjoy running through green spaces and along the Millennium Coastal Path. The event is UKA licensed and AIMS certified, providing excellent facilities and support. Virtual and kid races are also available.
Races
Marathon
10 km
Race Date:
08 March, 2026
The Great Welsh Marathon (26.2 miles / 42.195 km) is a standalone full‑marathon distance race held each spring on a flat and fast closed‑road course originating and finishing at Pembrey Country Park, Wales. With just 18 m of maximum elevation and 110 m total ascent, the route follows the scenic Millennium Coastal Path and is a certified Marathon Majors qualifying event ideal for PB chasers and first‑time marathoners on the stunning Carmarthenshire coast.
Race Date:
08 March, 2026
The Great Welsh 10 K (10 km / 6.2 mi) is a standalone road race held each mid‑March at Pembrey Country Park in Carmarthenshire, Wales. Launched in 2025, the fully USATF‑licensed 10 K races along the flat, closed‑road Millennium Coastal Path offer runners scenic views, official timing, water stops, recycled‑medal finisher awards, and a finish line certificate—all independent of the half and full marathon events.
Weather based on historical averages.
FAQs
What is the Great Welsh Marathon?
How long is the Great Welsh Marathon?
Where does the Great Welsh Marathon take place?
What is the elevation gain of the Great Welsh Marathon?
How can I prepare for the Great Welsh Marathon?
How do I choose the right training plan for the Great Welsh Marathon?
The Great Welsh Marathon (26.2 miles / 42.195 km) is a standalone full‑marathon distance race held each spring on a flat and fast closed‑road course originating and finishing at Pembrey Country Park, Wales. With just 18 m of maximum elevation and 110 m total ascent, the route follows the scenic Millennium Coastal Path and is a certified Marathon Majors qualifying event ideal for PB chasers and first‑time marathoners on the stunning Carmarthenshire coast.
The Great Welsh Marathon is 42km long.
The Great Welsh Marathon takes place in Pembrey Country Park, Carmarthenshire, Wales, UK.
The Great Welsh Marathon elevation gain is 110 meters, which Runna classifies as a Flat race.
The best way to train for the next race is to use a personalized 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 personalized 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 Great Welsh Marathon?
The Great Welsh Marathon (26.2 miles / 42.195 km) is a standalone full‑marathon distance race held each spring on a flat and fast closed‑road course originating and finishing at Pembrey Country Park, Wales. With just 18 m of maximum elevation and 110 m total ascent, the route follows the scenic Millennium Coastal Path and is a certified Marathon Majors qualifying event ideal for PB chasers and first‑time marathoners on the stunning Carmarthenshire coast.
How long is the Great Welsh Marathon?
The Great Welsh Marathon is 42km long.
Where does the Great Welsh Marathon take place?
The Great Welsh Marathon takes place in Pembrey Country Park, Carmarthenshire, Wales, UK.
What is the elevation gain of the Great Welsh Marathon?
The Great Welsh Marathon elevation gain is 110 meters, which Runna classifies as a Flat race.
How can I prepare for the Great Welsh Marathon?
The best way to train for the next race is to use a personalized 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 Great Welsh Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Great Welsh 10K?
How long is the Great Welsh 10K?
Where does the Great Welsh 10K take place?
What is the elevation gain of the Great Welsh 10K?
How can I prepare for the Great Welsh 10K?
How do I choose the right training plan for the Great Welsh 10K?
The Great Welsh 10 K (10 km / 6.2 mi) is a standalone road race held each mid‑March at Pembrey Country Park in Carmarthenshire, Wales. Launched in 2025, the fully USATF‑licensed 10 K races along the flat, closed‑road Millennium Coastal Path offer runners scenic views, official timing, water stops, recycled‑medal finisher awards, and a finish line certificate—all independent of the half and full marathon events.
The Great Welsh 10K is 10km long.
The Great Welsh 10K takes place in Pembrey Country Park, Carmarthenshire, Wales, UK.
Runna classifies the Great Welsh 10K elevation profile as Flat.
The best way to train for the next race is to use a personalized 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 personalized 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 Great Welsh 10K?
The Great Welsh 10 K (10 km / 6.2 mi) is a standalone road race held each mid‑March at Pembrey Country Park in Carmarthenshire, Wales. Launched in 2025, the fully USATF‑licensed 10 K races along the flat, closed‑road Millennium Coastal Path offer runners scenic views, official timing, water stops, recycled‑medal finisher awards, and a finish line certificate—all independent of the half and full marathon events.
How long is the Great Welsh 10K?
The Great Welsh 10K is 10km long.
Where does the Great Welsh 10K take place?
The Great Welsh 10K takes place in Pembrey Country Park, Carmarthenshire, Wales, UK.
What is the elevation gain of the Great Welsh 10K?
Runna classifies the Great Welsh 10K elevation profile as Flat.
How can I prepare for the Great Welsh 10K?
The best way to train for the next race is to use a personalized 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 Great Welsh 10K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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!
More
Sport:
Running
Tags:
Nature
Coastal
Team
Virtual
Park
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Great Welsh Marathon or Front Runner Events Limited. 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 Great Welsh Marathon website.
