Snowdonia Half Marathon

Sunday 16th May 2021

Event update

Update 11th January 2021

On listening to the Welsh governments forecast on the Covid vaccination roll out, it is seeming more unlikely that we will not see any events take place in Wales until the summer time?
As it is now nearly time to start ordering supplies for this event, we have to assess the likelyhood of the event being allowed to go ahead, so…based on the above we are going to set a couple of provisional back up dates for this race: August 22nd and December 5th.
Please note that you enter this race on the proviso that it may have to be rescheduled, once your entry has been processed no refunds or deferment can be made, if you entered this event between 17.11.20 and 10.01.20 then as no purchases had been made for medals etc to date, you can request a refund or simply keep your place for one of the new dates.  Please email your request to:

Update 2nd November 2020 

Dear runner, it is with a heavy heart that we must cancel the Snowdonia half marathon race that we had hoped to put on 6th December, despite having pushed it back twice to new dates throughout the year.

Also unfortunately the four castles series can’t be completed this year, runners must re-enter this race next year to complete the series, we cannot defer this years entry to next year due to us already having purchased the medals and T-shirts on your behalf back in January.

So this year it will have to be a virtual event from 6th December, you have 4 weeks to complete it .

It has been a very tough year for us here at Run Wales, with almost all our events having to be cancelled and 4 people out of work, but…hey ho chin up and hopefully we will all be back at it next year!

Please email to confirm your delivery address and also confirm your T-shirt size, also, if you let us know the time you completed your virtual Snowdonia half marathon, then we will send you a certificate of completion.

We will start posting out the medals etc from 7th December.

We trust you understand our decision and look forward to seeing you all next year.

Update 31st July 2020 

At present this event is now planning on going ahead on 6th December 2020, if you can’t make this date then you will be able to do it virtually during December, details on the virtual option will be updated during November.

Update 29th July 

At present this event is still planning on going ahead, more details on Friday 31st July.
Should we need to postpone this event it will then be held on 6th December, if you can’t make that date then you will be able to do it virtually during December, details on the virtual option will be updated during November.

Update 25th March

Following UK Athletics and Welsh Athletics advice we are now moving the Snowdonia Half marathon to our first reserve date on August 23rd, if the race can’t go-ahead on this date then we have a reserve date set for 6th December.

Link to UK Athletics:


Update 19th March

In light of the coronavirus and the unknown situation we are all in! when/will the country return to some form of normality any time soon? May, June, July?, well none of us know? therefore Run Wales have added some reserve dates for our next event (Snowdonia Half marathon) which should take place on 17th May.

We would all love this to go ahead and get back into the racing spirit, so we are keeping the current date, but are also adding provisional dates of August 23rd and December 6th.

We will monitor the advice given by the government as we go through April and make a final decision on the date by 3rd May.

There are 600 runners already registered and we have ordered 1,000 medals, therefore if you notice the advice given by the government that mass participant events are allowed to take place again for any of the above dates, get yourself entered ASAP and reserve one of those 400 medals for yourself.

In the meantime, please keep safe! 


2020 Entry now open

A scenic but tough Half Marathon set in the beautiful Snowdonia National Park, North Wales. Starting and finishing in the village of Llanrwst which played host to the World Trail Running Championships in 2013. The park is a region of haunting beauty and grandeur, of wild rocky mountains, hidden valleys, cascading rivers, still glacial lakes and deep forests.

2020 sees the 9th running of this very scenic race, there were a record 870 runners who entered the 2019 race, feedback suggests everyone enjoyed the race with lots of comments about the tough hills, but they said that it made the course a challenge and gave them a sense of achievement.

This year we intend to make this Half Marathon not just a great race but a great event, we are working with the local community to ensure your race day or weekend is memorable and encourages you to return year on year. RunWales are proud of the events we organise, with the emphasis on the runners enjoyment of the whole event, this is what we expect as runners and so will provide for you.

Feedback from runners suggested it should be a little more challenging given the name “Snowdonia Half Marathon” so in 2016, we listened and oh yes it is now more challenging, we have taken out the road to and from the village of Trefriw and re-routed you straight up to Llyn Geirionydd, then up and over to Llyn Crafnant, back down towards Trefriw, before turning heading to go up the 1:7 hill (Forest Hill) at approx. mile 11, then back down to the finish via Gwydyr Castle, good luck guys, you’ll need it!!!

You will leave Llanrwst on race day and tell your Family, Friends and Colleagues “I did it, I completed the Snowdonia Half Marathon”

Race HQ:  Opens at 8:00am and closes 9:45am, is now at the Galsdir Business Centre, Llanrwst

Race starts: 10am
Cost: Affiliated £30 Unaffiliated £32 (YOU MUST BE AT LEAST 17 YRS OLD ON RACE DAY)
Includes a Quality bespoke medal and Tshirt.
Entry fee now includes vat.

No Fun Run at this event.

Refreshments: Light refreshments, Tea, Coffee, sandwiches, cakes, soft drinks etc will be available to purchase at the start/finish area from the cricket club house, all money raised will go towards the local cricket team. Please go along and support the club.

Run for the Hospice

(Free Entry with St David’s Hospice with a minimum sponsorship, please read our Charity page for further information)

*Please note that it is UKA policy that Headphones are not allowed during this race in accordance with UK Athletics rules as the course does not have a full road closure with the exception of bone-conducting headphones. and is Rule 240 S 5 UKA SUPPLEMENT HEADPHONES.

For more info on where to stay:

Snowdonia Marathon Eryri

Check out the Half Marathon video below: