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Ultra-Trail Snowdonia by Utmb

Llanberis, United Kingdom • 15-17 May 2026

Ultra-Trail Snowdonia by UTMB

Ultra-Trail Snowdonia by UTMB is a UTMB World Series trail running event based in Llanberis, North Wales, scheduled for 15 to 17 May 2026. The programme runs across the Eryri Snowdonia landscape and features technical trails with substantial elevation gain.

The event comprises multiple race distances and formats held across the three days:

  • 164 km UTS 100M, 9500 m+ ascent
  • 104 km UTS 100K, 6500 m+ ascent
  • 56 km UTS 50K, 3400 m+ ascent
  • 25 km ERYRI 25K, 1400 m+ ascent

In 2025 the event attracted more than 2,800 runners from over 60 nationalities across its four distances. Race entries for some distances are listed as full; other races show open registration and published entry fees. Event materials include runner information pages covering required experience, mandatory kit, race regulations, and practical visitor details such as travel and parking. The event also presents an Ultra-Trail Village and other on-site services for participants and visitors. Visit the organization's website for the most recent information.

United Kingdom Wales Llanberis

Race information

Website
UTMB 20K UTMB 50K UTMB 100K UTMB 100M
164 km
Uts 100m
104 km
Uts 100k
56 km
Uts 50k
25 km
Eryri 25k
Visit the organization's website for the most recent information.
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