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Ultramarathons in Wales

71 upcoming ultramarathons in Wales, United Kingdom.

34 cities
Busiest: November
From €11
See all 71 races
Distance
5K races10K racesHalf marathonsMarathonsUltramarathons
Terrain
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See all 71 races
Upcoming races
The Black Beacon - 100 mile

The Black Beacon

Hay on Wye, United Kingdom
Oct 30·In 2 days·Closed·From €57
Black Beacon Mountain Races - 100M

Black Beacon Mountain Races

Hay-on-Wye, United Kingdom
Oct 30·In 2 days
Coast 2 Coast Winter Ultra

Coast 2 Coast Winter Ultra

Pwllheli, United Kingdom
Nov 7·In 10 days·Closes Nov 6·From €91
Beacons Ultra, Marathon and Half 2026

Beacons Ultra, Marathon and Half 2026

Talybont-on-Usk, United Kingdom
Nov 7·In 10 days·Closes Nov 1·From €46
Beacons Ultra - 49 miles

Beacons Ultra

Talybont-on-Usk, United Kingdom
Nov 7·In 10 days·From €46
OTT Ultra 2026
48.3km

OTT Ultra 2026

Merthyr Tydfil, United Kingdom
Nov 7·In 10 days·Closes Nov 1·From €69
Off The Tarmac Ultra Marathon - 30 miles
48.3km

Off The Tarmac Ultra Marathon - 30 miles

Merthyr Tydfil, United Kingdom
Nov 7·In 10 days·From €69
Pen Llyn Ultra - 38 mi
61.2km

Pen Llyn Ultra

Pistyll, United Kingdom
Nov 7·In 10 days·Closes Nov 6
EnduranceLife Gower - Ultra

EnduranceLife Gower

Swansea, United Kingdom
Nov 7·In 10 days·From €32
The Anglesey 3 Peaks - 55K
55K

The Anglesey 3 Peaks

Moelfre, United Kingdom
Nov 14·In 2 weeks·From €71
The Smurf Run - Wales - 50K

The Smurf Run - Wales

Aberdare, United Kingdom
Nov 21·In 3 weeks·From €21
Saturn Running - Aberdare - 50K

Saturn Running - Aberdare

Aberdare, United Kingdom
Nov 21·In 3 weeks
Sea 2 Summit | Offa's Dyke Half/Full/Ultra - Ultra Marathon (33 miles)

Sea 2 Summit | Offa's Dyke Half/Full/Ultra

Prestatyn, United Kingdom
Dec 6·From €44
The 8 Trigs of Trigmas - 24 Hour Ultra Challenge - 5 Trigs

The 8 Trigs of Trigmas - 24 Hour Ultra Challenge

Llanbenwch, United Kingdom
Dec 12
Celtic Trail Races - 34 miles / 55K

Celtic Trail Races

Aberdare, United Kingdom
Dec 12·From €48
The Snow Globe Gallop Bobble Hat Run - 50K

The Snow Globe Gallop Bobble Hat Run

Aberdare, United Kingdom
Dec 20·From €28
Saturn Running - Aberdare - 50K

Saturn Running - Aberdare

Aberdare, United Kingdom
Dec 20
The Winter Run to the Castle Ultra

The Winter Run to the Castle Ultra

Aberdyfi, United Kingdom
Jan 16, 2027
Tour De Yr Wyddfa - 43.5 km

Tour De Yr Wyddfa

Llanberis, United Kingdom
Jan 23, 2027·Registration TBC·From €30
Saturn Running - Aberdare - 50K

Saturn Running - Aberdare

Aberdare, United Kingdom
Jan 24, 2027·Registration TBC
Brecon to Cardiff - 43 mi Ultra
69.2km

Brecon to Cardiff

Cardiff, United Kingdom
Feb 14, 2027·From €98
Saturn Running - Aberdare - 50K

Saturn Running - Aberdare

Aberdare, United Kingdom
Feb 28, 2027·From €11
St David's Day Dragon Run 2027 - 50km

St David's Day Dragon Run 2027

Aberdare, United Kingdom
Feb 28, 2027·From €21
Beast of the Blacks 10, 20 and 40 Mile Trail Running Challenge

Beast of the Blacks 10, 20 and 40 Mile Trail Running Challenge

Crickhowell, United Kingdom
Mar 6, 2027·From €61
Beast Of The Blacks - 40 Miles

Beast Of The Blacks

Crickhowell, United Kingdom
Mar 6, 2027
Beast of the Blacks 10,20&40 Mile Ultra - 40 Miles

Beast of the Blacks 10,20&40 Mile Ultra

Crickhowell, United Kingdom
Mar 6, 2027·From €61
WYVUM by Pegasus 2027 - 30 mi

WYVUM by Pegasus 2027

Chepstow, United Kingdom
Mar 6, 2027·From €55
Castle2Castle #Ultra - 32 mi
51.5km

Castle2Castle #Ultra - 32 mi

Welshpool, United Kingdom
Mar 13, 2027·Closed
Running 9 to 5 - Wales - 50 km

Running 9 to 5 - Wales

Aberdare, United Kingdom
Mar 14, 2027·Registration TBC
Rasus y Bannau - 100K

Rasus y Bannau

Brecon, United Kingdom
Apr 2, 2027·From €57
HAYUM by Pegasus 2027 - 30 miles

HAYUM by Pegasus 2027

Hay-on-Wye, United Kingdom
Apr 3, 2027·From €55
Bigmoose Ultra Fun Run

Bigmoose Ultra Fun Run

Cardiff, United Kingdom
Apr 11, 2027·From €29
South Wales 200 2027 - 200mi
321.9km

South Wales 200 2027 - 200mi

Chepstow, United Kingdom
Apr 14, 2027·From €631
She Ultra - 50K
50K

She Ultra - 50K

Pwllheli, United Kingdom
Apr 17, 2027·From €85
Beast of the Beacons 10,20&40 Mile Ultra

Beast of the Beacons 10,20&40 Mile Ultra

Talybont-on-Usk, United Kingdom
Apr 17, 2027·From €63
Beast of the Beacons Ultra 40m plus 20m & 10mile - 40 Mile

Beast of the Beacons Ultra 40m plus 20m & 10mile

Llangynidr, United Kingdom
Apr 17, 2027·From €64
North Wales 50k & 100k

North Wales 50k & 100k

Prestatyn, United Kingdom
Apr 24, 2027·From €70
North Wales - 100k Trail

North Wales

Prestatyn, United Kingdom
Apr 24, 2027·From €66
HOWUM by Pegasus 2027 - 30 mi

HOWUM by Pegasus 2027

Llanidloes, United Kingdom
May 1, 2027·From €55
Welsh 3000's Ultra Run - 50K (approx. 30 miles)
50K

Welsh 3000's Ultra Run - 50K (approx. 30 miles)

Snowdonia, United Kingdom
May 1, 2027·From €207
Epona 100 2027 - 100mi

Epona 100 2027

Abergavenny, United Kingdom
May 8, 2027·From €167
Eryri 100M - 163 km / 100 miles

Eryri 100M

Llanberis, United Kingdom
May 14, 2027·Registration TBC
Eryri 80K
78K

Eryri 80K

Caernarfon, United Kingdom
May 14, 2027·Registration TBC
Welsh Festival - 24 hrs / 79.7 miles

Welsh Festival

Aberdare, United Kingdom
May 29, 2027·From €25
Heart of Wales Line (HOWL) - 50 mi

Heart of Wales Line (HOWL)

Llandrindod Wells, United Kingdom
May 29, 2027·Registration TBC
CRANUM by Pegasus 2027 - 30 miles

CRANUM by Pegasus 2027

Aberystwyth, United Kingdom
Jun 5, 2027·From €55
The Llangollen 50K
50K

The Llangollen 50K

Llangollen, United Kingdom
Jun 5, 2027
Pomona 100 2027 - 100 mi

Pomona 100 2027

Chepstow, United Kingdom
Jun 11, 2027·From €177
GB Ultras - Ultra Wales 50 - 51 Mile
82.1km

GB Ultras - Ultra Wales 50 - 51 Mile

Ganllwyd, United Kingdom
Jun 19, 2027
OTT Ultra-R - 31 miles
49.9km

OTT Ultra-R - 31 miles

Brecon, United Kingdom
Jun 20, 2027·Registration TBC
PIGUM by Pegasus 2027 - 30 miles

PIGUM by Pegasus 2027

Abergavenny, United Kingdom
Jul 3, 2027·From €55
Beacons Way Ultra 100 Mile

Beacons Way Ultra 100 Mile

Abergavenny, United Kingdom
Jul 24, 2027
RunThrough Trails Brecon Beacons 51K & 24K August 2027

RunThrough Trails Brecon Beacons 51K & 24K August 2027

Talybont-on-Usk, United Kingdom
Aug 7, 2027·From €51
Black Cattle Ultra Gwartheg Duon - 44 miles / 71K

Black Cattle Ultra Gwartheg Duon

Cardiff, United Kingdom
Aug 14, 2027·From €98
Sirona 100 2027 - 100mi

Sirona 100 2027

Barmouth, United Kingdom
Aug 14, 2027·From €167
Dragon Slayer Ultra - 35 miles
56.3km

Dragon Slayer Ultra - 35 miles

Chepstow, United Kingdom
Aug 29, 2027·From €40
RUDUM by Pegasus 2027 - 30 mi

RUDUM by Pegasus 2027

Caerphilly, United Kingdom
Sep 4, 2027·From €55
West Coast 200 2027 - 200 mi
321.9km

West Coast 200 2027 - 200 mi

Portmeirion, United Kingdom
Sep 7, 2027·From €631
WhyWeRun Wales - 250km Ultra Challenge
250K

WhyWeRun Wales - 250km Ultra Challenge

St Davids, United Kingdom
Sep 13, 2027·From €805
Trails & Tarmac Summer 12 Hour Backyard Ultra - 12 Hour, 12 loops of 4.2 miles
51.5km

Trails & Tarmac Summer 12 Hour Backyard Ultra - 12 Hour, 12 loops of 4.2 miles

Crickhowell, United Kingdom
Sep 18, 2027·From €86
View all 71 races

Your guide to ultramarathons in Wales, United Kingdom

There are 71 upcoming ultramarathons in Wales, United Kingdom, spread across 34 cities. Filter by distance or terrain to narrow things down, and save the races you like the look of.

Most take place in November, April and July. Next up is The Black Beacon - 100 mile in Hay on Wye on 30 October 2026.

Questions runners ask

How many ultramarathons in Wales, United Kingdom are there?

Finndu lists 71 upcoming ultramarathons in Wales, United Kingdom, across 34 towns and cities. The list is updated twice a day as organisers announce new races.

When is the next one?

The Black Beacon in Hay on Wye, on 30 October 2026.

Which month has the most ultramarathons in Wales, United Kingdom?

November, followed by April and July.

How much does it cost to enter?

Entry starts from £10. Fees vary from race to race, so check each race page for its current price.

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