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Built on bad decisions in Boulder, CO.

Ultra-Trail Snowdonia

5 Race Events100 Mile, 25K, 100K, 50 Mile, 50K

UTMB

Llanberis, Wales, United Kingdom

Ultra-Trail Snowdonia ERYRI 25K

Ultra-Trail Snowdonia ERYRI 25K

May 17, 2026

Ultra-Trail Snowdonia UTS 100K

Ultra-Trail Snowdonia UTS 100K

May 16, 2026

Ultra-Trail Snowdonia UTS 100M

Ultra-Trail Snowdonia UTS 100M

May 15, 2026

Ultra-Trail Snowdonia UTS 50K

Ultra-Trail Snowdonia UTS 50K

May 16, 2026

Ultra-Trail Snowdonia UTS 80K

Ultra-Trail Snowdonia UTS 80K

May 15, 2026