- Sat 11 Jul 2026
- Early bird
Early bird on now
09:30
Age 17 & over
£31.99-£37.99
- 9.8 km trail running + 1335 ft ascent
Event overview
This epic event starts and finishes in Llanberis, Wales’ outdoor capital, and offers Trail Marathon, Ultra Marathon, Half Marathon, 10K and 24-hour options.

The route explores rugged mountain trails, soaring panoramic views and relentless climbs — everything that makes Snowdonia legendary among outdoor enthusiasts. You’ll run through iconic locations including Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass and the slopes of Yr Wyddfa (Snowdon), creating what many consider one of the UK’s most striking trail marathon routes.
Highlights
One of the UK's most challenging trail races
The Ultra Marathon and Marathon are both ITRA & UTMB-indexed races.
Spectacular scenery
Unbeatable views across Eryri (Snowdonia).
Lively event village
Music, commentary, shopping, food, kit demos and toilets.
Family friendly vibes
Family finishes and plenty to see and do.
Support and fuel
Friendly marshals, signage, energy stations and support vehicles.
Unique finisher mementos
Beautifully designed to reflect our event locations and local history.
Professional timing
Chip timing, live tracker and online results.
This event is part of Snowdonia Trail Marathon Eryri Events.
Event photos
Event community
- Average fitness
- Beginner-friendly
- Dogs allowed at venue
- Event expo
- Event village
- Families
- Free venue entry
- Spectators
- Teams
- Traders at event
Kit
A list of compulsory and advisable kit is readily available.
Walking poles
You are permitted to carry and use walking poles if you wish to.
Families
The event village is family-friendly and is at a location with lots on offer for families. There'll be a great atmosphere for spectators who can track the person they are supporting using an app so they don't miss them at key points.
- Bone conducting headphones only
- Cut off time
- First aid
- Hilly
- Marshals
- Mass start
- No cut off time
- Out and back
- Sweeper
- Toilets
- Water stations
- GPX available
GPX route
The route is displayed on the map above.
Introduction
It’s your chance to run at your pace, soak in the mountain air, and enjoy a more open course experience than ever before.
The race is curated for trail runners of all abilities, offering outstanding mountain views, woodland sections, and race-day atmosphere without the need to reach ultra distances. It's an achievable adventure with world-class scenery.
Make a weekend of it! You can bring friends or family for their 10K challenge on Saturday, then stay to cheer on the marathoners and ultra runners on Sunday. It’s the perfect weekend to run, support, and enjoy the vibrant event village in Llanberis.
overview
This beautiful 10k has something for all runners. The first 5.5k has a mixture of road, track and trail and takes in the beautiful lower slopes of Yr Wyddfa (Snowdon). It then passes across the valley, dipping into the beautiful woodlands around Dolbadarn Castle, before taking on the gruelling zig-zags that take you to the top of Vivian Quarry. Once here, it's downhill on stunning forest trails all the way to the finish line.
Feed stations
Water and High 5 energy drink and gels will be available at 2 miles/3.2km and 4 miles/ 6.4km.
Cut off
2 hours and 30 minutes.
- Cafe
- Mountains
- Music
- Paid parking
- Secure bag storage
- Toilets
Event HQ
Llanberis
Llanberis
Caernarfon
Gwynedd
LL55
UK
Llanberis, North Wales has superb transport links and is incredibly easy to find.
Registration
Registration is located on the event field in Llanberis situated next to the Community Centre - LL55 4UR.

Parking
Parking information is included in your Final Instructions email. Please be considerate to local residents when parking and use official event parking or pay and display car parks.
By car
There’s quick, straightforward access from the North West along the M56 and A55. Motorway links with the Midlands are good too, and the same roads – the M6, M5 and M1 – also bring Snowdonia within easy reach of the South of England
By rail
Direct services (including direct trains from London to Bangor) take you to the popular North Wales coastal destinations from most parts of Britain.
The closest station to Llanberis is Bangor, which is just under 10 miles away. A taxi from here will cost approximately £25. The Sherpa S2 bus will take you from the station and cost between £3-£5. It is possible to cycle.
By sea
Irish Ferries and Stena Line operate regular and high-speed services to Holyhead from Dublin.
By air
Transfers from the international gateways of Manchester, Liverpool and Birmingham take less than two hours.
Accommodation
Llanberis and the surrounding areas offer a wide range of hotels, bed and breakfast, campsites and hostels.
The Royal Victoria Hotel is recommended.
- Chip timing
- Eco medal
- Event app
Included
Lively Event Village
Music, commentary, shopping, food, kit demos & toilets.
Family friendly vibes
Family finishes, signage, energy stations 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
Unbeatable views across Eryri (Snowdonia).
Professional timing
Chip timing, and live online results.
Optional extra
- Race photography
Prizes
There will be a prize-giving ceremony after the races. Prizes are not sent out after the event, so make sure you attend the ceremony and receive your big Welsh cheer!
Prize Categories for the Snowdonia Trail 10K are (for both men and women).
- Overall Top 3*
- Senior 1st runner
- V40 1st runner
- V50 1st runner
- V60 1st runner
- V70 1st runner
* If any runner places in Overall and Vet then a drop down system will occur.
If you are looking for a challenge, the Snowdonia Trail Race is up there with the toughest in the U.K. A punishing and beautiful experience in equal measure, ensure this one is on your bucket list. Luke Royle (2019) RaceCheck
Absolutely AMAZING day - so well signposted, not the slightest chance of getting lost and wonderful camaraderie amongst all runners. I met some really wonderful people at various points on the course and it really keeps you going strong!!! Anonymous post-event feedback 2023
Loved running the marathon - many thanks for what was the best organised trail event I’ve done. The Marshalls were brilliant. Post event feedback 2023
My first trail marathon and what can I say but 'WOW’. Adam Gurney, Racecheck
Race village, route marking, feed stations, marshals, views and sense of achievement at the very highest standard. Do it! Matt Hall (2022) RaceCheck
- Bring your own cup
- Plastic bottle free
- Plastic-free event
- Public transport links
- Recycling
- Reusable cups
- Sustainability policy
As a local Welsh company the organiser's goal is to showcase the beautiful natural environment without causing harm. Event since their first race in 2011, they have avoided plastic bottles, offered locally-sourced Welsh slate finisher mementoes and have lead on sustainability in events.
- Age 17 & over
- Entries open
- Enter online
If you opted for a postal entry there is no need to register in person before the event. Your Final Instructions will be printed on the back of your bib, and they will also be available on the website 10 days prior to the race.
If your bib is not being posted you will need to collect it from registration. Registration will take place on Saturday afternoon and before the race on Sunday morning. We will confirm specific times in your Final Instructions.
Entry fees
Entry fee
£31.99
Valid to 31/12/2025
Entry fee
£33.99
Valid 31/12/2025 - 05/07/2026
Entry fee
£37.99
Valid 05/07/2026 - 09/07/2026
Other races at event
- Sun 12 Jul 2026
- #2 of 5
09:00
Age 17 & over
£44.99-£49.99
- 12.9 miles trail running + 3959 ft ascent
- Sun 12 Jul 2026
- #3 of 5
08:30
Age 18 & over
£59.99-£64.99
- 27.3 miles trail running + 1685 m ascent
- Sun 12 Jul 2026
- #4 of 5
06:30
Age 20 & over
£97.99-£104.99
- 57 km trail running + 2199 m ascent
- Sat 11 - Sun 12 Jul 2026
- #5 of 5
10:00
Age 18 & over
£129.99-£319.99
- 24 hrs trail running + 3182 ft ascent