Epic racing in the heart of Eryri
Closing Date: 12.06.2026
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Slateman Triathlon & Duathlon 2026
The Slateman Triathlon & Duathlon is the most iconic multi-sport adventure race in Wales — and our first ever event, making it a true cornerstone of our history.
Starting in Llanberis, the heart of Eryri (Snowdonia)’s industrial heritage, this unparalleled race combines breathtaking scenery with epic challenges. 220 Tri Magazine has listed the Slateman among the world’s best triathlons, and it’s widely regarded as a bucket-list event for every triathlete — one not to be missed from any athlete’s calendar.
Go Beyond One Race – Join the Adventure Triathlon & Duathlon Series 2026
Introducing the Adventure Triathlon & Duathlon Series 2026, a two-event journey across North Wales’ most stunning and demanding landscapes: The Slateman and The Superfeet Sandman.
By entering both events with a Season Pass, you’ll become part of an exclusive community of multi-sport athletes taking on the full adventure. You’ll also unlock extra benefits designed to make your season unforgettable.
Season Pass Benefits
- Guaranteed entry into both The Slateman & The Superfeet Sandman
- Free limited-edition Adventure Series hoodie
- Exclusive series results and rankings — see how you perform across both races
- Choice of distance: Sprint, Standard, or Legend (70.3) triathlon, plus Duathlon options
Whether you’re aiming for your first multi-race season or chasing podium glory, the Season Pass is your ticket to a complete North Wales triathlon experience — from the mountains to the sea.
Ready to double your adventure?
Choose your distance
Slateman 2026
Sprint
14 Jun 2026
Swim: 750 Metres
Bike: 20.2Km
Run: 5.8Km
Slateman 2026
Standard
14 Jun 2026
Swim: 1500m
Bike: 49.9km
Run: 11.7km
Slateman 2026
Slateman Legend (70.3)
14 Jun 2026
Swim: 1,900 Metres
Bike: 92.6Km
Run: 23.1KM
Slateman 2026
Slateman Ultra
14 Jun 2026
Swim: 2.4 Miles
Bike: 180KM
Run (Chwarel Finish): 44.5KM
Run (Mynydd Finish): 49.9KM
Slateman 2026
Standard Duathlon
14 Jun 2026
Run 1: 5.8km
Bike: 49.9km
Run 2: 11.7km
What's Included
Lively Event Village
Music, commentary, shopping, food and chill out zones.
Family Friendly Vibes
Family finishes and plenty to see and do.
On Course Support
Brilliant marshals, signage and pick up vehicles
Unique Finisher Mementos
Beautifully designed to reflect our event locations and local history.
Spectacular Scenery
Eryri's awe-inspiring scenery is the backdrop to your race.
Professional Timing
Chip timing & live online results
"I have been racing for 30+ years and this was not only a superb setting with outstanding scenery on the bike and run but also the toughest 70:3 run I’ve ever raced. Well organised; all the marshals and team were happy and helpful, would certainly recommend as a race to do."
2025 Participant
Event Information
Slateman Triathlon & Duathlon 2026
FAQs
Slateman Triathlon & Duathlon 2026
Travel & Accommodation
Slateman Triathlon & Duathlon 2026
Info for Locals
Slateman Triathlon & Duathlon 2026
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Slateman Triathlon & Duathlon 2026
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Slateman Triathlon & Duathlon 2026
Race Reports
We are proud that all our events are bilingual. Signs, registration and commentary are available in English and Welsh.
Event Partners
Working with local communities
Looking after our environment
Find out more about Looking after our environmentTees for Trees
Find out more about Tees for Trees