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Ultra-Trail Snowdonia by Utmb

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

Llanberis, United Kingdom • 15 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

163 km

Uts 100m

100 km

Uts 100k

78 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 May 26

Mynydd Mawr

Nantlle

7 km

Mynydd Mawr is a midweek race near Caernarfon covering 6.7 km with 450 m of ascent, part of the North Wales Mid Week Series. Navigational skills are required; preregistration is requested and a day-entry fee of £2 applies.

Saturday May 30

Welsh 1000m Short Fell Race

Pen-y-Pass

A mountain fell race of 13 km and 1550 m ascent finishing at Yr Wyddfa Summit, requiring navigational skills and prior mountain experience. Registration is in Llanberis with compulsory coach transfer to the Ogwen start.

Saturday May 30

Welsh 1000m Peaks

Abergwyngregyn

13 km

32 km

A long fell race of 32 km with 2870 m ascent finishing at Yr Wyddfa Summit that requires navigational skill and significant mountain experience; pre-entry includes coach travel, GPS tracking and a souvenir mug.

Tuesday Jun 2

Moel y Gest

Gwynedd

4 mi

A midweek fell race at Tyddyn Llwyn Camp Site near Porthmadog, covering 5.9 km with 349 m climb. The AS-classified course is partly waymarked, part of the North Wales Mid Week Series, and includes junior categories.