Slateman Triathlon & Duathlon | Standard Triathlon

Season Pass

Join the Adventure Triathlon & Duathlon Series 2026:

• The Slateman
• The Superfeet Sandman

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:

• 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?

GPX route

The route is displayed on the map above.

Overview

This iconic Slateman triathlon delivers a tough, unforgettable journey through the heart of Eryri (Snowdonia). You’ll swim in crystal-clear freshwater beneath Yr Wyddfa, cycle a spectacular loop that almost circumnavigates the mountain, then tackle a brutally memorable run through historic slate quarries, forests and lakeside trails before finishing back in Llanberis.

Description

Swim in the incredible fresh water of Llyn Padarn in the shadow of Yr Wyddfa (Snowdon) surrounded by the history of Slate Mining in the Welsh hills.

The cycle route takes in some of the most iconic views in North Wales. Begin the cycle by turning right out of transition and heading towards Caernarfon. As you flow around the course towards Beddgelert, make sure you keep an eye out on your left because you’re circumnavigating Yr Wyddfa! Once you’re through the beautiful, quaint village of Beddgelert, you’ve got one last challenge to come. You must now cycle up the narrow and winding Nant Gwynant Pass and return to the top of Pen y Pass. Make sure you take in some of the most spectacular views in the country before you descend back to Llanberis and transition.

The Slateman run starts relatively easy but no less beautiful than the rest of the route, taking in the historic Dolbadarn Castle, but as you run past Llyn Peris at the foot of the Dinorwic Slate Quarry, don’t lose your nerve when you see what's to come. A 2km climb up the zig zags through the quarry takes your legs and your breath away. Carrying on through this most awesome man-made landscape for another 1.5km, you then come to the descent into the forest. Head towards Fachwen and a short section of road, followed by a steep descent once more into the trees. You will then make your way along the beautiful trails of Parc Padarn and past the Old Quarry Hospital as you make your final descent down to the field and the final straight to the finish line. You may, by now, have some idea of what it was like to be a real Slateman.

Route highlights

• A true test of grit
• Big climbs, historic terrain and constantly changing scenery
• A finish that leaves you knowing exactly what it means to be a Slateman

Swim | Llyn Padarn

• Freshwater swim in one of Wales’ most beautiful lakes
• Set beneath Yr Wyddfa and surrounded by slate-mining heritage

Cycle | Snowdonia loop

• Roll out of transition towards Caernarfon
• Scenic roads with constant views as you circumnavigate Yr Wyddfa
• Pass through the picturesque village of Beddgelert
• Major challenge climbing the narrow, winding Nant Gwynant Pass
• Reach the top of Pen y Pass before a thrilling descent back to Llanberis

Run | The Slateman route

• Early flatter section past Dolbadarn Castle
• Run alongside Llyn Peris at the foot of Dinorwic Slate Quarry
• Iconic 2km zig-zag climb through the quarry — steep, exposed and relentless
• Continue across dramatic slate landscapes before descending into forest trails
• Pass Parc Padarn and the Old Quarry Hospital
• Final descent to the fields and a fast run-in to the finish

Cut off times

In the interest of athlete safety and the safety of our volunteers on the course, there will be strict cut-off times in place.

• You have a total of 55 minutes to complete your swim and exit transition.
• You have a total of 3 hours 5 minutes to complete your bike and exit transition.
• You have a total of 2 hours 15 minutes to complete your run.

Event HQ

Llanberis
Llanberis
Caernarfon
Gwynedd
LL55
UK

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, and live online results.

Optional extra

• Race photography

Prizes

Individual

• Overall - Top 3
• Junior U20 - Top 1
• Senior 20 - Top 1
• Senior 30 - Top 1
• Vet 40 - Top 1
• Vet 50 - Top 1
• Vet 60 - Top 1
• Vet 70 - Top 1

Included

Teams

• 1st Team

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

I entered this event based on reviews and after the fantastic time I had at the Sandman Triathlon the previous September. I cannot fault any part of the event. A stunning and demanding route on both the bike and run really pushed me, and I could have kept swimming in the lake for ages. Brilliant marshal support and organisation in Llanberis meant everything worked perfectly. I would certainly recommend this event to anyone ready for a proper challenge in beautiful surroundings. I will definitely return and hope to fit in the whole adventure series next year. Helen W

My review is long and detailed because I couldn’t find any sprint-distance-specific reviews when I was researching the race. If you are thinking about entering next year — do it, but be prepared. Claire F

A choice of four triathlon distances set in the beautiful scenery of Snowdonia. Cold open-water swim with challenging hilly run and bike courses. Meirion M

Reviews thanks to RaceCheck

Entry fees