The Ultimate Adventure Triathlon Series
Events / Triathlon / Duathlon
Adventure Series Triathlon & Duathlon 2025
The Adventure Series consists of three stunning and unforgettable mixed terrain triathlons & duathlons; The Slateman, The Snowman and The Sandman. Completing the series is a tick that every athlete wants and a once-in-a-lifetime experience.
As if that wasn't enough, by entering the Adventure Series you receive 50% off the individual event price of the Sandman*
Over the years we've seen an amazing array of athletes enter the Adventure Series from novice to elite. When half the challenge is just in completing all the events, anyone can win and we've had some very surprised champions pick up the exceptional prize packages in the past!
*You will not receive the discount or be entered into the Series if you make separate entries into the individual events. If you have already entered an event and wish to upgrade please contact us.
Dates
08 Jun - 21 Sep 2025
Location
Llanberis, Plas y Brenin, Newborough Forest
Races
Choose your distance
Adventure Series 2025
Sprint Triathlon
08 Jun - 21 Sep 2025
Swim: 750m
Bike: 20km/31km/22.9km
Run: 5.8km/6.1km/5.4km
Adventure Series 2025
Standard Triathlon
08 Jun - 21 Sep 2025
Swim: 1500m
Bike: 49.6KM/69.2km/42.3km
Run: 11.5km/8.4KM/9.8km
Adventure Series 2025
Legend (70.3) Triathlon
08 Jun - 21 Sep 2025
Swim: 1900m
Bike: 92.6km/92km/93km
Run: 23.1km/21.1km/19.7km
Adventure Series 2025
Duathlon
08 Jun - 21 Sep 2025
Run: 5.8km/2.4km/2.1km
Bike: 49.9km/31km/25km
Run: 11.5km/6.1km/5.4km
What's Included
Lively Event Villages
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
I am a 14 time Ironman. Wow, wow, wow you guys blew me away! I am converted. Your event was so well organised, the course fantastic, marshals so, so friendly and the attitude of everyone involved so positive and co-operative. Just what us nutters want from events like this.
2019 Participant
Event Information
Adventure Series Triathlon & Duathlon 2025
FAQs
Adventure Series Triathlon & Duathlon 2025
Travel & Accommodation
Adventure Series Triathlon & Duathlon 2025
Info for locals
Adventure Series Triathlon & Duathlon 2025
Volunteer
Adventure Series Triathlon & Duathlon 2025
Gallery
Other Events
04 Oct 2025
Llandudno Triathlon & Duathlon 2025
06 Apr 2025
Eirias Triathlon & Duathlon 2025
08 Jun 2025
Slateman Triathlon & Duathlon 2025
22 Jun 2025
Cardiff Triathlon & Duathlon 2025
03 Aug 2025
Craft Snowman Triathlon & Duathlon 2025
07 Sep 2025
Triathlon y Bala 2025
21 Sep 2025
Superfeet Sandman Triathlon & Duathlon 2025
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 environment
Tees for Trees
Find out more about Tees for Trees