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Snowdonia Trail Marathon

Event details
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Compete within the shadow of England and Wales' highest peak, Snowdon. Great for experienced athletes looking for a new challenge, this mixed-terrain course will take athletes around and up the famous mountain. Come for one of the UK's most testing trail runs and the great event atmosphere.
C-19 Plan
Always Aim High Events has confirmed that this event will be going ahead as planned on Saturday 10th Jul 2021 in accordance with the COVID-19 safety measures. Learn more

Review summary

4 Reviews
  • Course
  • Organisation
  • Atmosphere


John E
"Buzzin’,as I ended up on the podium! 😉. Had my folks and wife with me to..."


Paul A
"Brilliantly brutal event. Nothing prepared me for "running" up a mountain. The..."


James H
"A stunning route with a mix of challenges. Very well organised and route is..."
See all reviews

How to enter the Snowdonia Trail Marathon

  1. Ultra Marathon

    Run 59.8km
    Book Now
  2. Marathon

    Run 27.3mi
    Book Now
  3. Half Marathon

    Run 12.9mi
    Book Now
  4. 10K

    Run 10km
    Book Now

Snowdonia Trail Marathon routes

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Extreme Event

You will be pushed to your limits at this event Learn more.

The Snowdonia Trail Marathon consist of four different events:

Ultra Marathon: 59.8KM
Trail Marathon: 27.3 Miles
Half Marathon: 12.9 Miles

Arguably one of the UK's most challenging trail races, all four races will experience the the truly spectacular surroundings of Snowdonia National Park.

The Ultra Marathon includes 7000ft of climbing across the 60KM route and it passes through Cwm Tresgl and Cwm Pennant before making the ascent of Snowdon.

The Trail Marathon encompasses a 1,685m climb over 26 miles which also includes an ascent of Wales Highest Peak.

The Half and 10KM courses will follow similar tracks and trails which have been adapted to perfectly fit these distances.

Event Details

What’s Included
  • Great event village
  • Fully distance marked
  • Refreshment stations
  • Live music at the village
  • Chip timed
  • Official event photography
  • On-site first aid
  • Free massage
  • Finisher's medal
  • Post-race goody bag
  • Free T-shirt
Raceday Logistics


0630: Ultra Marathon

0900: Trail Marathon

0945: Half Marathon

1015: 10K

Registration will take place in the event village on either Saturday Afternoon and Sunday Morning.

Cut Off Times

There is a compulsory cut off at 1415 at Pen Y Pass to safeguard the well being of both athletes and our marshals. Athletes arriving after this time will be offered the choice of returning by foot to the event village or waiting for a shuttle vehicle. Buses to Llanberis are £1.50 should you wish to use them.

Ultra Marathon - Mile 28.6 (46.00 Km). You will need to average 16.15 min/mile or 10.06 min/Km

Marathon - Mile 18.8 (30.25 Km). You will need to average 16.45 min/mile or 10.25 min/Km

The Finish Line will close at 1830. This allows the below times for completion.

Ultra Marathon: 12 Hrs

Marathon: 9 Hrs 30 Mins

For Marshal Welfare, Half and 10K runners will need to finish within the following times.

Half Marathon: 6 Hrs 30 Mins

10K: 2 Hrs 30 Mins

Kit List

A recommended kit list will be sent out to those who have registered.


This is a truly fantastic weekend to be part of and spectators are an integral part of creating an epic race day atmosphere.

The event village provides the perfect base for all spectators.


If you would like to find out more about volunteering at this event, please get in touch with: [email protected]

Frequently Asked Questions

Is there an age limit?
All 10KM and Half Marathon runners must be 17+ on 12/07/2020 and Marathon/Ultra runners must be 18+.
When is registration?
The registration process can be completed on either the Saturday afternoon before the event or the Sunday morning of the race.
Where can I access results?
Race times will be posted live as well as uploaded online after the event.

Meet the organiser

Always Aim High Events was founded in 2010 by Tim Lloyd and Nigel 'Kenny' Kendrick. The first event was the now iconic Slateman Triathlon 2011 attracting just over 400 competitors (it now regularly exceeds 1,000), with a vision that included the Snowman and Sandman - the three events which now make up the Adventure Triathlon Series. From that one event we now host 34 all inclusive events over 9 weekends, with many more planned for 2019 and beyond. In 2015 Always Aim High Community Events was set up as a not for profit organisation to help with engaging with and hosting local community events. At Always Aim High we are extremely proud about delivering the UK's ultimate triathlon, cycling, running and swimming challenges in the most beautiful and iconic locations that we can find. From epic mountain, coastal and city triathlons, to breathtaking cycle sportives which cover the length and bredth of Snowdonia, there's something for everyone at Always Aim High Events!



Snowdonia Trail Marathon reviews (4)

4.9 out of 5 stars

  • Course
  • Organisation
  • Atmosphere
  • Did the Marathon in 2019

    Brilliantly brutal event. Nothing prepared me for "running" up a mountain. The "path" up was anything but, I'd call it scrambling although I'm sure experienced people wouldn't! One you must do, but probably only once! The aid stations were pretty poor with only fruit and gels at some stations. This would have been very basic for a normal rod marathon let alone a tough one that took me 8hr30 - the guys and girls doing the ultra would have had the same.
  • Did the Half Marathon in 2019

    Buzzin’,as I ended up on the podium! 😉. Had my folks and wife with me to witness my greatest achievement yet. The set up was fantastic,everyone was super friendly,would definitely go to another event by Always Aim High 👊.
  • Did the Marathon in 2019

    A stunning route with a mix of challenges. Very well organised and route is well marked out. My knee went quite early on so I had to walk the final 13miles!
    The climb up to the summit is beautiful, busy with walkers also but we just pushed them off the mountain (joke!). We were very fortunate with the weather, it wasn’t too hot or too cold, I ran the whole race without the need to pull on a long sleeve top or remove layers. The aid stations are well placed out but I strong recommend ensuring you can carry at least 1 litre of water plus electrolytes, I found I was refilling my bottles at the final 2 (or 3 aid stations).
    Fantastic support from spectators or walkers passing by, the marshalls were very friendly and encouraging too - big up to Beddgelert Marshall ‘Sean’ for walking the final mile with me.
    A very painful downhill descent and finally crossing the line in 8hrs 15mins led to a very emotional finish, but so worth it!
  • Did the Marathon in 2019

    Excellent event. Well marshalled with plenty of water stations. Friendly, supportive atmosphere. Good organisation.
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