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Race for Life Caernarfon
Across the river from Caernarfon's medieval castle
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Race for Life Cardiff
Along the River Taff beside Cardiff Castle
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24 Hours South - The Offa's Dyke Ultra
24-hour timed ultra along the ancient Offa's Dyke
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Radyr Trail Half Marathon & Marathon
Trails runners call "beautiful and brutal"
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National Forest Way Ultra 75
75 miles across the wild Midlands from Alrewas to Beacon Hill
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Snowdonia Half Marathon
Half marathon through Snowdonia's mountain scenery
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Race for Life Aberystwyth
Along Aberystwyth's Victorian seafront promenade
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Eryri by UTMB
Circles Yr Wyddfa through Eryri National Park
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Off The Tarmac Trail Marathon & 10 Mile
Trail marathon into the Brecon Beacons foothills
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The Compton Marathon & 16 Mile Challenge
Loops crisscrossing the ancient Ridgeway, Berkshire Downs
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Race for Life Swansea
Beside Swansea's National Waterfront Museum
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Barry Island 10K
Sun, sea and sand at the seaside resort of Barry Island
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Llanelli Half Marathon
Flat coastal course along Wales' Millennium Coastal Path
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Anglesey Half Marathon & 10K
Closed roads with Eryri's peaks across the Menai Strait
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The Swansea 5K
Fast, flat 5K with views over Swansea Bay
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Race for Life Llanelli
Along Wales' coast path over old tinplate works
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Green Park Reading 10K & Family Runs
Flat, fast 10K looping through Reading's Green Park
Save any of these to your season in RunCalendar and hear the morning entries open. Free on iPhone, no account needed.
Every race here is published by its organiser; RunCalendar checks the date and the entry window against the organiser's own page and rebuilds this calendar every night. A confirmed date shows its day; a provisional one shows only its month. Last updated 22 October 2026.