Ultra Marathons in Wales

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Wales may be smaller than its northern neighbours, but it packs an incredible punch for ultra runners. Known as a "Mecca" for trail and mountain running, Wales offers some of the most technical and breathtaking terrain in the British Isles. Whether you are looking for the jagged ridgelines of the north or the sweeping golden sands of the south, Wales provides a legendary backdrop for every endurance athlete.

Use the filters below to search through the most popular upcoming ultramarathons in Wales all in one place.

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35 events found

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100 Miles

Epona 100 Mile Ultra

Distance: 101 Miles

Elevation: 5,181M

Location: Abergavenny, Wales

Date: Sat, 8th May 2027

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100 KM

Epona 100K Ultra

Distance: 101KM

Elevation: 3,100M

Location: Talgarth, Wales

Date: Sat, 8th May 2027

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50 KM

The Llangollen 50k

Distance: 49KM

Elevation: 1,657M

Location: Llangollen, Wales

Date: Sat, 5th Jun 2027

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50 Miles

Ultra Wales 50

Distance: 51 Miles

Elevation: 2,898M

Location: Coed-Y-Brenin

Date: Sat, 19th Jun 2027

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50 KM

Snowdonia Ultra Marathon Eryri

Distance: 57KM

Elevation: 2,199M

Location: Llanberis, North Wales

Date: Sun, 11th Jul 2027

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100 KM

Beacons Way Ultra 100Km

Distance: 100 Km

Elevation: 3,451M

Location: Brecon Beacons

Date: Sat, 24th Jul 2027

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100 Miles

Beacons Way Ultra 100 Miles

Distance: 100 Miles

Elevation: 6,143M

Location: Brecon Beacons

Date: Sat, 24th Jul 2027

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100 KM

Ultra X Wales 110K

Distance: 110KM

Elevation: 4,816M

Location: Abergavenny, Wales

Date: Sat, 24th Jul 2027

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50 KM

Ultra X Wales 50K

Distance: 50KM

Elevation: 2,166M

Location: Abergavenny, Wales

Date: Sun, 25th Jul 2027

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100 Miles

Sirona 100 Mile Ultra

Distance: 103 Miles

Elevation: 4,572M

Location: Barmouth, Wales

Date: Sat, 14th Aug 2027

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50 Miles

Run to the Castle

Distance: 42 Miles

Elevation: 893M

Location: Aberdovey, Wales

Date: Sat, 14th Aug 2027

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Why Run an Ultra in Wales?

Running in Wales is about more than just the mileage; it is about the heritage and the challenge of the landscape.

Home to three National Parks, Eryri (Snowdonia), the Bannau Brycheiniog (Brecon Beacons), and the Pembrokeshire Coast, Wales offers a variety of terrain from alpine-style peaks to coastal cliffs.

Despite the remote feel of many trails, most Welsh race hubs are easily accessible from major UK cities, making it the perfect location for a weekend race.

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Running Gear Reviews

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STYRKR CEL50 Energy Chew Review

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Leki Ultratrail FX.One Poles Review

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Kailas Fuga EX330 Review

We test this Tor des Geants-inspired ultra shoe to see if its Vibram grip is worth the £150 price…

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SunGod Classics⁴ PRO Sunglasses Review

We put the new SunGod Classics4 PRO sunglasses to the test to see how they hold up for ultrarunning.

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Nitecore UT27 vs UT6 Head Torch Review

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RACE FAQs

What are the best ultra marathons in Wales for beginners?

For those new to the distance, the Dragon Coastal 30 or 50 is highly recommended. Unlike the technical mountain races in the north, these coastal ultras feature flatter, non-technical trails and breathtaking scenery along the Wales Coast Path, making them a perfect entry point into the world of Welsh ultramarathons.

Which is the hardest ultra marathon in Wales?

The Dragon Back Race is widely considered the toughest mountain race in the world, let alone Wales. It covers approximately 380km over six days, following the mountainous spine of Wales from Conwy Castle to Cardiff, with a staggering 17,400m of total ascent, nearly twice the height of Mount Everest.

When is the best time of year for an ultra in Wales?

The peak season for Wales ultra marathons is between April and September. While summer offers longer daylight hours for events like Ultra-Trail Snowdonia (UTS), autumn and spring provide cooler temperatures ideal for endurance running. However, Welsh weather is famously unpredictable, so carrying compulsory kit is essential year-round.

Are there 100 mile ultras in Wales?

Yes, Wales hosts several iconic 100 mile races. Key events include the Dragon 100, which traverses the stunning Gower and Glamorgan heritage coasts, and the Epona 100, a brutal but beautiful loop through the Bannau Brycheiniog (Brecon Beacons). These races are world-class qualifiers for major international events.

Can I walk during a Welsh ultramarathon?

Most ultras in Wales allow a mix of running and walking, especially on steep technical climbs where power hiking is a common strategy. However, always check the specific race cut-off times. Most organisers, such as those for the Beacons Ultra, welcome hikers as long as they can maintain the minimum required pace to reach checkpoints safely.

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Ultramarathons In Wales

Welsh Ultra Marathons