Ultra-Trail Snowdonia by Utmb

Ultra-Trail Snowdonia by UTMB

Ultra-Trail Snowdonia by UTMB is a UTMB World Series trail running event based in Llanberis, North Wales, held from 15 to 17 May 2026. The event runs multiple race distances on mountain and upland trails across Eryri (Snowdonia). It lists specific requirements and race regulations for entrants and uses the MyUTMB system for registration and account management.

The event programme for 2026 includes four main races with published distances and elevation gains:

• UTS 100M: 164 KM, 9500 M+ elevation
• UTS 100K: 104 KM, 6500 M+ elevation
• UTS 50K: 56 KM, 3400 M+ elevation
• ERYRI 25K: 25 KM, 1400 M+ elevation

Race availability varies by distance. For 2026, the UTS 100K and UTS 50K are listed as full with general registrations closed, while UTS 100M and ERYRI 25K are shown as open for registration. Entry fees are published per race and are listed exclusive of an 8% booking fee.

In 2025 the event recorded participation from more than 60 nationalities and over 2,800 runners across the four distances. The organiser provides information on mandatory kit, required experience, race regulations, travel and accommodation, and results. Visit the organization's website for the most recent information.