woman walking on green grass field

Ultra-Trail Snowdonia by UTMB 78K

78K·Llanberis, United Kingdom
ultra100 mile100k50kmountaintechnicaltrailqualifier

Photo by Massimo Sartirana on Unsplash

Distance78K
Date15 May 2026

About This Race

The 78K distance strikes a compelling balance between the technical demands of Snowdonia's mountain terrain and the strategic pacing required for a full ultra-distance effort. Runners tackle the majority of the event's signature climbs and exposed ridgeline sections while maintaining enough focus for consistent forward movement through the demanding rocky terrain that characterizes this course. This distance appeals to experienced trail runners ready to test their mountain navigation and technical descending skills across a substantial but manageable timeframe, offering a serious introduction to multi-peak Welsh mountain running without the extreme duration of the longer options.

Practical Info

Weather

Variable mountain conditions typical of North Wales in May, with potential for rain, wind, and temperature changes with elevation

Nearest Airport

MAN - Manchester Airport

Accommodation

Llanberis offers various accommodation options from B&Bs to hotels, with additional lodging available in nearby Snowdonia villages

Best For

experienced trail runnersultra runnersmountain runners

Notable Features

As part of the UTMB World Series, this race maintains the highest standards of organization and course design. The event showcases the dramatic landscapes of Snowdonia National Park through technical single track that demands both fitness and technical skill. The multi-day format creates a festival atmosphere in the historic mountain town of Llanberis, complete with family activities including the ERYRI MINI kids' race.