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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

Saturday Apr 11

She Ultra

Pwllheli

50 km

A single-distance 50 km ultramarathon in Pwllheli on 11 April 2026, with a published entry fee of £74 plus booking fee. The event enforces a no crew, no pacers policy and requires mandatory kit and medical disclosure.

Sunday Apr 12

Ogwen | Yr Helgi Du

Experience the Ogwen valley through this skyrunning event in Eryri. Choose between 10km, 25km, and 40km routes featuring technical mountain terrain and alpine peaks starting from the National Outdoor Centre.

Sunday Apr 19

Trawsfynydd Lake Race

Trawsfynydd

9 mi

An 8.6 mile multi terrain loop around Trawsfynydd lake in Snowdonia, run under Welsh Athletics rules. Proceeds support the volunteer South Snowdonia Search and Rescue team; chip timing, marshals and water stations provided.

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.