Start & Finish Venue

Cae Llan/Village Green, Station Road, Betws-Y-Coed, LL24 0AE

Pre-Race Registration – Friday 4th September 2026

5.30pm – 9.00pm Race Registration – Bib Number Collection Only

Race Day – Saturday 5th September 2026

4.15am – 5.30am GB Race Tracker Collection, Bib Number Collection & Drop-bag Dropoff
6.00am – Race Start 100 Mile Snowdon Ultra 

When collecting your bib number on either Friday or Saturday, please bring with you a form of identification so we can verify your details.

If you arrive after 05:30am on Saturday morning, you will only be able to register, collect your bib number and tracker AFTER the race has started. No additional time will be given for checkpoint cutoffs.

Please car share wherever possible to minimise the carbon footprint as much as possible. ‘Long Stay’ 24 hour Pay & Display parking is available for just £6 at Betws-y-Coed (Card payment is available but please bring the correct change in case there is a fault with the pay and display, as it’s very unlikely you’ll find anything open so early on Race day).

Where support crews are permitted at checkpoints, parking is chargeable – please ensure you bring change to pay for your parking as some machines only take cash

Yr Wyddfa Snowdon Ultra 100 mile has 11 Checkpoints en route maintaining a high level of support.

Each of the checkpoints have refreshments including cola, tailwind, water and juice as well as a variety of sandwiches, salted potatoes, fruit, snacks, crisps and chocolate. Vegetarian and vegan refreshments will be available. At indoor checkpoints, hot food such as pasta, beans on toast will be available along with hot drinks. We’ll also have a Medic, First Responder or a First Aider available at each CP.

There are strictly enforced cut-off times per Checkpoint implemented by the Event Organisers, GB Ultras, to ensure a safe event.

Checkpoint distances are approximate and may vary each year should there be minor diversions on the route (due to local authority/landowner works).  You must enter the checkpoint before the cut off time to proceed further in the event.  Should you pass through the Checkpoint in time, you may stay at the relevant checkpoint for no more than 20 minutes after the cut off.

Participants must attend ALL checkpoints and have their details recorded by the Checkpoint teams.

Failure to check-in at a Checkpoint will result in your disqualification from the race.

The locations of the Checkpoints for this event are:

Checkpoint 1: 8.4 Miles

SH68510 60202 Gwern Gof Isaf, LL24 0EU
Cut off 09:19 Saturday
SUPPORTERS / CREWS – GB Ultras request compliance that Supporters (friends and family) and Support Crews do not ATTEND CP1 due to safety concerns based on large numbers of vehicles travelling to the location along narrow roads and no available parking.  Please note, race rules, time penalties/disqualification may apply to their runner.

Checkpoint 2: 13 Miles

SH66013 55772 Field opposite Pen-y-Gwyrd hotel, Nant Gwynant, LL55 4NT.
Cut off 10:59 Saturday
Limited chargeable parking is available (coins only)  in the lay-bys on the road close to the checkpoint. Traffic wardens actively patrol the area and you risk receiving a penalty if a parking ticket is not displayed. DO NOT PARK IN THE BUS TURNING AREA  – you risk your vehicle being towed away.

Checkpoint 3: 23 Miles

SH66013 55772 Field opposite Pen-y-Gwyrd hotel, Nant Gwynant, LL55 4NT (after summitting Yr Wyddfa).
Cut off 16:45 Saturday
Limited chargeable parking is available (coins only)  in the lay-bys on the road close to the checkpoint. Traffic wardens actively patrol the area and you risk receiving a penalty if a parking ticket is not displayed. DO NOT PARK IN THE BUS TURNING AREA  – you risk your vehicle being towed away.

Checkpoint 4: 28 Miles

SH64968 60372 Pont Pen-y-Benglog, LL57 3LZ
Cut off 20:15 Saturday

Checkpoint 5: 38 Miles

SH75619 61819 Llyn Crafnant Car Park, approx. LL27 0YX/LL27 0JZ
Cut off 23:55 Saturday
SUPPORTERS / CREWS – GB Ultras request compliance that Supporters (friends and family) and Support Crews do not ATTEND CP5 due to safety concerns based on large numbers of vehicles travelling to the location along narrow roads and no available parking.  Please note, race rules, time penalties/disqualification may apply to their runner.

Checkpoint 6: 45 Miles

Mandatory kit MUST be carried AT ALL TIMES during the race.

Failure to carry all items of mandatory kit can result in a participant being disqualified.

Random kit checks at race registration, during the race and at the finish line will take place.

If you do not have all the items of kit during kit check at Registration, you will not be permitted to race.

Yr Wyddfa Snowdon Ultra Mandatory Kit

Hardcopy Map: Ordnance Survey (OS Explorer): Map OL17 Snowdon/Yr Wyddfa & OL18 Harlech, Porthmadog & Y Bala or Harveys Map XT25 Snowdonia North (please note the OS version has greater detail but is more bulky).
Waterproof coat with sealed seams, i.e. Goretex – Min 10,000mm
Base Plate Compass
2 x Base layer long sleeved (1 x Must be separate from Start Kit in a dry bag)
Water bottle or bladder -min 1 litre capacity,
Fully charged mobile phone (in clear waterproof bag),
Survival/thermal bag or Bivi bag (Foil Blanket not sufficient),
Headtorch – Min 75 Lumens,
Emergency Rations – Min 500 Calories,
Whistle,
Backup Light source – Min 25 Lumens (Not your phone),
GPS Tracker (provided by GB Race Tracker at Race Registration beside the Start line prior to the Race).
Waterproof trousers
Gloves
Warm hat

Recommended Kit
First Aid Kit
GPS Watch/Personal GPS handheld device
Mountain/Trekking Poles
Cup for hot drinks at indoor checkpoints

Please be aware GB Ultras Races Now Cupless! You can buy a GB Ultras reusable cup CLICK HERE to visit the shop.

GB Ultras Merchandise

We’ll have a range of our GB Ultras branded merchandise available at both race registration and at the finish. If you want to see what’s available now, head over to the GB Ultras Shop here.

• Baselayers
• Casual wear
• Drybags
• Enamel cups
• Running vests
• Soft cups
• Technical t-shirts
• Visors, caps and beanies

Optional Event T-shirt 

If you’ve pre-ordered your optional event t-shirt, you’ll be able to collect this during race registration on either day, or from our shop whilst the race is ongoing.  To make sure yours is waiting for you to collect, you can order it here if didn’t order one when you entered the race.

Availability is limited and we can’t guarantee that event t-shirts won’t be available on the day to purchase!

Runners can utilise a Dropbag facility to transport a change of kit/supplies to two points during the race.

Dropbags will be transported to dedicated checkpoints, CP6 (Betws-y-Coed) and CP10 (Beddgelert).  These should be different dropbags.  Please do not leave valuables.

As an example, a Dropbag may contain a change of clothes, etc for you to access at each location. Any dropbag should be clearly labelled with the participant’s Surname & Race number at Registration. Labels will be provided at Race Registration on race morning.

Dropbags must be no larger than 50L.  Bags larger than this size will be refused.

GB Ultras recommend participants use a medium size pack a similar size to a cabin case, approx capacity 37 litres (55cm x 39cm x 20cm). Alternatively, you can purchase one of our drybags from our online store here: Large Dry-bag

Dropbags can be left at race registration ON RACE DAY ONLY.

Dropbags can be left between 4:15am and 5:30am with the Event Team in a designated area.

Support crews are more than welcome to pick up dropbags providing prior authorisation is given by the runner (at Race Registration) and early collection by the runner is fine too.  Please note dropbags at checkpoints at different locations during the race will only make their way to the finish venue when the checkpoint in question closes.

In the event that you withdraw from the race before reaching the finish, you must collect your dropbag from the finish venue.  Dropbags will not be transport to locations along the route.  Any dropbags not collected from the finish line will be disposed of after the event.  We are not able to post out dropbags that are not collected.

Dropbag 1: CP6
SH79450 56498 Betws-y-Coed Village Green – Cae Llan, Station Road, Betws-Y-Coed, LL24 0AE.

Dropbag 2: CP10
SH58781 48129. Beddgelert Community Hall – A4085, Aberglaslyn Hall, Beddgelert, Gwynedd, LL55 4UY.

A single pacer/ support runner is permitted from the halfway point of the race at Checkpoint 6.

Only one pacer is permitted to join the participant at anyone time and the pacer must not carry any of the runners mandatory kit. A pacer must be on foot.

Pacers must be self-sufficient throughout the time they are supporting the participant and will not be able to make use of any of the checkpoint provisions. Pacers must not enter the checkpoint locations except to use toilet facilities or top-up their own water.

Pacers MUST carry all items listed in the Mandatory Kit list. Pacers will be subject to random kit checks and if found not carrying all items in the Mandatory Kit list, they will not be permitted to continue.

The results will be available real-time during the event and we’ll update this page with the link prior to the event.

As each runner crosses the finish line, their race chip records their individual finishing position and finishing time.

Your position and time shown in the results link is your official result. 

***Please note that the tracking system is different to the timing system and has no bearing on your chip time or result.  Due to overlaps of the route at sections of the race, i.e. along the Snowdonia Slate Trail, the Glyderau miners track and towards Betws-y-Coed, the ranking and estimated times of arrival at a checkpoint or finish may be affected.***

We’ll be posting the links to the official media team photographs here after the race has finished.  Please keep checking back to find yours.

Processing and editing the photographs does take some time so please allow 48-72 after conclusion of the race for the links to be added.

We’ll also be adding photographs taken by the event team on our Ultra Scotland Facebook page and in the GB Ultras Community Facebook Group as well!

2024 Event Photographs

2025 Event Photographs

Andrew Paylor Photography: Start Line and Course Photos

Dan Bentley Photography: Finisher Portraits

David Murch @ Mick Hall Photography: Event Photos

GB Ultras Event Team: Incoming

Neil Shearer Photography: Start Line | The Big One | CP5 Trails | CP8 | River Trails | Betws Boardwalk

Ridgeline Media: Finish Line Photos and Course Photos

Tosh Simpkin: Album 1 | Album 2 | Album 3 | Album 4

Extreme care should taken especially at heights where a fall can be serious.  Llanberis Search & Rescue along with Ogwen Valley Mountain Rescue will be informed of the event. We’ll also have our own medical teams at checkpoints too (Tactical Medical Rescue). The weather and the amount of miles covered in daylight hours will undoubtedly contribute to the possible dangers encountered during the race so the mandatory kit must be carried throughout the event.

Checkpoints are approximately every 6 – 10 mile so the team will be there to support your race as much as we can.

Should you arrive on the Friday evening prior to the race as opposed to the Saturday morning of the Race we will be on hand to help with any questions. We will also be organising recce runs ahead of race day covering key sections of the route – details of these are further down the page.  A Mandatory Kit Brief and Race Brief is available to watch further down on this page.

Although largely a mountainous route, due to the nature of the event, there are inevitably some road crossings too where it will be necessary to slow and possibly stop as no roads are closed en route for the race itself.

As always, if you see a runner experiencing difficulties please inform Checkpoint Marshals. Each runner should have the Race HQ mobile number. Our team will always endeavour to reach any participant in difficulty but due to inaccessibility of the trail this can take time. Participants who lose time helping another fallen participant, struggling against the cut off time due to this reason, can claim this time back, subject to RD discretion and under the proviso of completing within their new, extended cut off period and providing support is available from our venues, medical team and event team.

In the mountains, the weather can change very quickly so the mandatory kit is essential for good reason. Depending on conditions closer to race day, additional kit may well be required too. Spot checks will be done on race day and any runner without the mandatory kit may be disqualified or time penalties will be imposed.

Due to running through mountain terrain, careful footing and approaching the ascent/descents from the correct lines are very important. Also when running in woodland and along trails, be mindful of loose branches, unseen stones, uneven terrain, falling branches, some overgrowth, stiles to negotiate, and slippery surfaces. The main danger is presented by steep drops, close to cliff edges on a number of occasions throughout the race. So please watch your footing and have a good bearing of where you are.

For those new to this type of event, the team is always happy to help with any queries so please feel free to get in touch via info@gbultras.com.

Be mindful and understanding of other users sharing the trail and please be aware mountain bikes are often frequented in and around Betws-y-Coed, sometimes you’ll hear them before you see them.  Please close gates as you pass through farmland and take care not to drop litter.

SUPPORTERS / CREWS – GB Ultras request compliance that Supporters (friends and family) and Support Crews do not ATTEND CERTAIN CHECKPOINTS due to safety concerns based on large numbers of vehicles attending locations. These maybe due to busy road crossing, limited parking, landowner requests or increased likelihood of blocking access/egress in case of an emergency. Please note, race rules, time penalties/disqualification may apply to their runner.

**DUE TO LIMITED PARKING AT CHECKPOINT LOCATIONS AND THE START/FINISH VENUE, A SINGLE VEHICLE PER RUNNER IS PERMITTED. SUPPORT TEAMS MUST NOT ARRIVE AT CHECKPOINTS ANY EARLIER THAN 30 MINUTES BEFORE THE EXPECTED TIME OF THEIR RUNNER**

Please note, due to parking limitations and limited access along narrow country lanes, Supporters (including Crews / Friends & Family) are not permitted to travel to the following locations:

Checkpoint 1

Checkpoint 5

Slate Trail via Gwern Gof Uchaf

Supporters risk the disqualification of their runner or time penalities being applied if they are present at any of the above locations where we have stated they are not permitted to travel to. Your race instructions will include a specific section on Supporters and will provide further details.

At other checkpoint locations, no more than two Supporters per participant are permitted at a checkpoint at any one time.  These must not impede the Event team nor other runners.  

Supporters must not take the food nor drink from the checkpoint except for their runner unless given permission to do so.

Supporters must take their rubbish with them – they are not permitted to leave rubbish at checkpoints.

Supporters must respect instructions given by Event Staff.  Failure to do so will result in them being asked to leave the checkpoint and possible time implications or disqualification of the runner.

No dogs are permitted at checkpoints.

Full details of the terms and conditions of entry can be found here.

Our Privacy Policy can be found here.

Withdrawal prior to the race