Slateman Triathlon & Duathlon

JUN
14
2026
The Slateman Triathlon & Duathlon is a multi-sport event set in the scenery of Eryri (Snowdonia) near Llanberis. It offers a range of distances from Sprint to Ultra triathlon, plus a Standard Duathlon. The event features an event village, family-friendly atmosphere, and bilingual support.
Sun 14 Jun 2026
Ultra (140.6) Triathlon Standard Triathlon Standard Duathlon Sprint Triathlon Legend (70.3) Triathlon

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Event Overview

The Slateman Triathlon & Duathlon takes place in Llanberis, within the Eryri (Snowdonia) National Park. It is described as a multi-sport adventure race. The event is part of a series called the Adventure Triathlon & Duathlon Series 2026, which also includes The Superfeet Sandman.

Distances

The event offers several triathlon and duathlon distances on a single date. The triathlon distances are:

  • Sprint: Swim 750m, Bike 20.2km, Run 5.8km
  • Standard: Swim 1500m, Bike 49.9km, Run 11.7km
  • Legend (70.3): Swim 1900m, Bike 92.6km, Run 23.1km
  • Ultra (140.6): Swim 2.4 miles, Bike 180km, Run (with two finish options) 44.5km or 49.9km

A Standard Duathlon is also available, consisting of Run 1 (5.8km), Bike (49.9km), and Run 2 (11.7km).

Event Features

The event includes an event village with music, commentary, shopping, and food. It is promoted as family-friendly and offers unique finisher mementos. Professional chip timing and live online results are provided. On-course support includes marshals, signage, and recovery vehicles. The event is bilingual, with signs, registration, and commentary available in both English and Welsh. Visit the organization's website for the most recent information.

Ultra (140.6) Triathlon
Standard Triathlon
Standard Duathlon
Sprint Triathlon
Legend (70.3) Triathlon