Marathons in Wales

Wales is home to 3 marathons in our database in United Kingdom, spread across cities including Cardiff, Llanberis, and Newport. Marathon Eryri is the largest race in the lineup, typically drawing around 2,500 finishers, while the full spread offers everything from fast urban courses to scenic regional events. Browse the races below for course maps, elevation profiles, typical weather, and practical race-day detail to help you choose your next start line. Plan by month on our marathon calendar or filter by country and region.

Cardiff, Wales, United Kingdom🇬🇧

Cardiff Marathon

The Cardiff Marathon draws approximately 2,000 finishers on an urban road in Cardiff, United Kingdom. The course starts and finishes at Cardiff Castle. The route passes Cardiff Bay, the Millennium Stadium, and Bute Park. Mostly flat with minor rises around the bay.

Next race: Sunday, 4 October 2026

Llanberis, Wales, United Kingdom🇬🇧

Marathon Eryri

The Marathon Eryri draws approximately 2,500 finishers each October on a mountain road in Llanberis, United Kingdom. It is one of the UK's iconic tough road marathons and rewards strength more than pace ambition. The course passes mountain lakes, steep Welsh road sections, and dramatic Snowdonia views almost throughout. Expect significant climbs on this hilly course.

Next race: Sunday, 4 October 2026

Newport, Wales, United Kingdom🇬🇧

Newport Marathon Festival

The Newport Marathon Festival draws approximately 1,999 finishers each April on an urban road in Newport, United Kingdom. It is widely regarded as one of the fastest full marathons in Wales. The route passes the River Usk, city bridges, and wide roads used for one of Wales's faster marathon layouts. The River Usk, city bridges, and wide Welsh roads make April's Newport Marathon Festival one of the fastest full marathons in Wales.

Next race: Sunday, 4 April 2027

Nearby Marathons

Other races closest to Wales.

Stratford-upon-Avon, England, United Kingdom🇬🇧· 119 km away

Shakespeare Marathon

The Shakespeare Marathon draws approximately 1,153 finishers each April on a historic town and rural road in Stratford-upon-Avon, United Kingdom. Its literary branding gives it one of the clearest thematic identities in UK marathon running. The course passes the River Avon, Shakespeare-linked town landmarks, and Warwickshire village roads. The River Avon, Shakespeare-linked town landmarks, and Warwickshire village roads give April's literary marathon one of the clearest thematic identities in UK road running.

Next race: Sunday, 4 April 2027

Chester, England, United Kingdom🇬🇧· 131 km away

Chester Marathon

The Chester Marathon attracts about 5,000 finishers each October through England's Roman walled city. The course passes the Eastgate Clock, Chester Cathedral, the Roman walls, and the Dee River on flat Cheshire terrain. October autumn weather and the historic Roman-heritage setting make it one of northwest England's most popular marathons.

Next race: Sunday, 2 May 2027

Abingdon, England, United Kingdom🇬🇧· 154 km away

Abingdon Marathon

The Abingdon Marathon is a traditional multi-lap race in Oxfordshire, drawing about 1,000 finishers each October on a flat, fast course at the Abingdon Airfield. The four-lap format on closed airfield roads is popular with UK runners chasing personal bests. October cool English weather and the simple, traffic-free course make it one of Britain's fastest autumn marathons.

Next race: Sunday, 18 April 2027

Manchester, England, United Kingdom🇬🇧· 177 km away

Manchester Marathon

The Manchester Marathon is one of the world's largest marathons, drawing approximately 28k finishers on an urban road in Manchester, United Kingdom. The course starts and finishes at Old Trafford. One of the UK's fastest courses, with no significant hills.

Next race: Sunday, 18 April 2027

Milton Keynes, England, United Kingdom🇬🇧· 183 km away

Milton Keynes Marathon

The Milton Keynes Marathon draws about 4,000 finishers each May through Britain's planned new-town city of redways and roundabouts. The course follows the linear park system, passes the Xscape dome, and uses the wide boulevards and traffic-free redways that define Milton Keynes. May spring weather and a flat, fast course make it popular with runners chasing personal bests in the Home Counties.

Next race: Sunday, 2 May 2027