Slate Trail Ultra

NOV
14-15
2026
A long-distance trail event on the Snowdonia Slate Trail offering 147 km and 80 km routes that visit historic slate landscapes with on-route aid stations, tracking and strict mandatory kit requirements.
14-15 Nov 2026
UTMB 100K/100M 147 kilometers 80 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Slate Trail Ultra

The Slate Trail Ultra is an ultra-trail event held on the Snowdonia Slate Trail in Eryri / Snowdonia National Park. It is offered over two distances:

  • 147 km with 3,900 m+ ascent
  • 80 km with 2,300 m+ ascent

Both routes follow sections of the Snowdonia Slate Trail and pass former slate mining sites, quieter villages and a variety of trails from valley paths to higher mountain passes, moorland and river gorges. The Slate Landscape of Northwest Wales on the route is a UNESCO World Heritage Site.

Event services include multiple fully stocked aid stations (eight for the long route, four for the shorter route), a drop bag transport point for the 147 km race, live GPS tracking and timing, a waterproof route map, and on-course medical cover. Finishers receive a locally produced slate finisher's medal, a hearty finisher meal and a beverage option, and UTMB/ITRA index contribution is applied for finishers.

Navigation is the competitor’s responsibility in sections that are not waymarked; GPX files and a waterproof map are provided. The event enforces a comprehensive mandatory kit list including map and compass, waterproof body cover, two torches with spare batteries, 1.5 L fluid capacity and survival equipment. Minimum recommended experience and mountain navigation skills are required; participants must be prepared for rapidly changing mountain weather and the possibility of trailrunning in the dark. Course cut-offs apply. Visit the organization's website for the most recent information.

147 km
Slate Trail Ultra
80 km
Ultra Tour of the Quarries

Events nearby

Trail races at Newborough Forest and Llanddwyn Island, offering 10k and half marathon distances, chip timing, on course support and bilingual services.
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.
Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.