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Ultra-Trail Snowdonia by Utmb

Name: Ultra-Trail Snowdonia by Utmb
Start: 2026-05-15
End: 2026-05-17
Location: Llanberis

Llanberis, United Kingdom • 15-17 May 2026

Ultra-Trail Snowdonia by UTMB

Ultra-Trail Snowdonia by UTMB is a series of trail races held in Llanberis, North Wales, and forms part of the UTMB World Series. The event takes place from 15 to 17 May 2026 and features mountain courses with substantial elevation gain.

Races and core figures include:

UTS 100M: 163 km, 9200 m+ elevation, Running Stones 4
UTS 100K: 100 km, 4400 m+ elevation, Running Stones 3
UTS 80K: 78 km, 2500 m+ elevation, Running Stones 3
UTS 50K: 56 km, 3400 m+ elevation, Running Stones 2
ERYRI 25K: 25 km, 1400 m+ elevation, Running Stones 1

Several races are listed as full for the 2026 edition while others show registrations open. The event awards Running Stones across its races as part of its competition structure. The 2025 edition involved more than 60 nationalities and over 2,800 runners across the event races. Visit the organization's website for the most recent information.

United Kingdom Wales Llanberis

Race information

Website

164 km

Uts 100m

104 km

Uts 100k

77 km

Uts 80k

56 km

Uts 50k

25 km

Eryri 25k

Visit the organization's website for the most recent information.

Trail runs nearby

Tuesday Apr 28

3 Hills Penmaenmawr

Penmaenmawr

5 km

A steep 4.7 km fell race near Penmaenmawr with about 489 m of ascent. The partly marked route uses rough, off track terrain and requires experience and basic navigation; parking is in the car park behind Spar.

Saturday May 2

Welsh 3000’s Ultra Run

Llanberis

48 km

Experience an epic guided traverse of the fifteen 3000 foot peaks in Snowdonia. This 48 km mountain run includes 4000 meters of elevation gain across three iconic ranges with full support and logistics provided.

Sunday May 3

Paddy Buckley Recce - Moelwyns

Capel Curig

35 km

A guided recce of the Paddy Buckley leg from Capel Curig to Nantmor across the Moelwyns, covering 35 km with 2,500 m of ascent on 3 May 2026. Small groups led by Mountain Leader qualified guides; entry fee £95 and minimum age 18.

Tuesday May 5

Moel Lus

Dwygyfylchi

3 mi

A 5.1 km fell race at Fairy Glen near Penmaenmawr with 273 m of climb, part of the North Wales Mid Week Series. A juniors programme has multiple age classes and race day entry is £2.