Slate Trail Ultra

NOV
14-15
2026
Long distance trail races along the Snowdonia Slate Trail offering 147 km with 3,900 m ascent or 80 km with 2,300 m ascent and strict mandatory kit checks.
14-15 Nov 2026
UTMB 100K/100M 147 kilometers 80 kilometers

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Slate Trail Ultra : Snowdonia, North Wales

The Slate Trail Ultra comprises two long-distance trail races that follow the Snowdonia Slate Trail through Eryri/Snowdonia National Park and former slate-producing areas. The routes pass abandoned slate mining villages, valley paths, higher mountain passes, moorland and river gorges, with extensive views of Yr Wyddfa/Snowdon and the surrounding landscape. The Slate Landscape of Northwest Wales is a UNESCO World Heritage Site.

Distances

  • 147 km Slate Trail Ultra, 3,900 m+ cumulative ascent.
  • 80 km Ultra Tour of the Quarries, 2,300 m+ cumulative ascent.

Both routes run largely anti-clockwise and include waymarked and non-waymarked sections. Competitors must self-navigate on extended non-waymarked segments; a GPX file and a waterproof route map are provided. The Slate Trail Ultra offers eight fully stocked aid stations, a drop bag facility (transported to Blaenau Ffestiniog at 74 km), live GPS tracking, durable race maps and a locally made slate finisher's medal. The Ultra Tour of the Quarries features four aid stations.

Mandatory kit is strictly enforced at registration and via spot checks on course. Required items include map and physical compass, two working head/hand torches each with separate spare batteries, waterproof full-body cover, capacity to carry at least 1.5 L fluid, whistle, survival bag, mobile phone and emergency fuel. Failure to carry mandatory kit will result in disqualification. Medical cover, event HQ facilities and a DNF shuttle are provided. Visit the organization's website for the most recent information.

Events nearby

Trail races in Newborough Forest and Llanddwyn Island offering 10 km and half marathon with an event village, chip timing and on course support.
A guided 55km route on Anglesey taking in three of the island's highest tops, with over 2000 m ascent, checkpoint support and a wooden finishers medal.
A 16.1 km Penmaenmawr fell race with 594 m ascent, partially marked terrain and required navigational skills; entry is online only and minimum age is over 18.
A guided 10 km trail run from the Sychnant Pass summit featuring runnable terrain, regular stops and a steady group pace on an upland route.
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