Slateman Triathlon & Duathlon
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Event overview
Slateman Triathlon & Duathlon 2026 is a multi-discipline race held in Llanberis, in Eryri (Snowdonia), on 14 June 2026. The event offers both triathlon and duathlon formats and includes a range of distance choices from sprint to full ultra distance. Registration can include a Season Pass that pairs this race with the Superfeet Sandman as a two-event series.
Race distances
- Sprint: Swim 750 metres; Bike 20.2 km; Run 5.8 km
- Standard: Swim 1500 m; Bike 49.9 km; Run 11.7 km
- Legend (70.3): Swim 1,900 metres; Bike 92.6 km; Run 23.1 km
- Ultra (140.6) Full: Swim 2.4 miles; Bike 180 km; Run 44.5 km or 49.9 km
- Standard Duathlon: Run 1 5.8 km; Bike 49.9 km; Run 2 11.7 km
Event features and series
The event includes an event village with music, commentary, shopping, food and chill-out areas. There are family finishes and on-site activities. On-course support comprises marshals, signage and pick-up vehicles. Finishers receive themed mementos. Timing is chip based with live online results. The Season Pass for the Adventure Triathlon & Duathlon Series provides guaranteed entry to both events, a limited-edition hoodie, and series results and rankings. All event signage, registration and commentary are available in English and Welsh. Visit the organization's website for the most recent information.
