At least 22 miles. The exact distance will be announced as we reveal more of the route, but you should be prepared for no less than 22 miles with significant ascent (well, from sea level to the summit of Snowdon for starters!), some steep terrain and some varied mountain weather. This is a full day’s outing on rugged ground.
Well, you should be prepared for a long day on your feet. Certainly you should be able to comfortably complete a half marathon and you should practise being in the mountains, whether that’s hiking, or running up them. BUT, this event is not designed solely for whippet-y fell runners. It is a unique proposition. Being way-marked (which means no map and compass required) this allows you to concentrate on the task at hand – which is covering the distance, looking after your nutrition and making sure you are comfortable – good footwear and the right clothing to put on if the weather turns a bit iffy. This is a step-up for 10k road runners but it’s achievable and is built to be so.
Kind of. But the obstacles are provided by Mother Nature. You could say that we have taken the concept of obstacle-based runs and put it into the hills. The concept is to provide a solid running challenge that links up a few obstacle encounters: These will be exhilarating and largely provided by the landscape, as opposed to being built. Think jumping, swimming (very short sections and with the use of buoyancy aids and safety cover), scrambling and possibly the use of some ropes. We might throw one or two man-made obstacles at you but these too will be “built into” the landscape.
Registration is at Llanberis Community Centre, which is also the finish line. Registration is on Friday 31st August ONLY, from approximately 2pm until approximately 10pm (final times will be confirmed). Saturday race day registration will not be possible. There is no car parking directly at the community centre but there are several pay and display car parks nearby.
We will be providing a bus transfer from Llanberis to the start line in Caernarfon. This service will cost £10. Busses are allocated against demand and must be pre-booked when you enter or through your account login in the ‘add products’ section. The bus will leave Llanberis at 06:30 on Saturday morning.
Solo entries are not transferable – you can’t give or sell your entry to anyone else. If you no longer wish to take part you can obtain an event credit to the value of your entry fee paid (terms and a fee apply) which you or another person can use towards next year’s event (or any other Rat Race event). If you have purchased a team of 5 or more runners, you can add or change team members up to 10 days before the event.
You may change your wave if there is space by emailing your request to events@ratrace.com. There is a £10 admin charge for this service.
The event starts in Caernarfon and finishes at Llanberis.
Llanberis is 7.5 miles from Caenarfon by road on the A4086.
Good question. You need to be ready to do 20 miles on foot in the mountains. That means sturdy off-road footwear, some good waterproofs, gloves, headwear and plenty to eat and drink. We’ll release a mandatory kit list prior to the event that you must carry for your safety. Based on weather conditions, we may insist on more mandatory kit too, nearer the time. But the basic principle here is to dress comfortably, in gear that you know and trust. Spend some time on the hills and try some combinations. We will have some feed stations en route but you should also endeavour to carry fluids and food that suit you. Our feed stations are there to support you; but they won’t provide energy gels and the like, so if you have a favourite Scooby snack or race nutrition solution, you should pack that on your person. The Rat Race Store has everything you could ever need to take on this epic challenge.
This is a running event, not a swimming event, but you will certainly get wet, and when it is full immersion we will issue buoyancy aids and have water safety staff on standby. In order to complete the event fully, you must be able to swim. But all of the water sections are short and can be bypassed if you wish.
No, dogs are not permitted to accompany runners.
No. We do not offer refunds but we do offer event transfer vouchers, so you can put your credit to another event. We need 10 calendar days’ notice prior to the event to make these changes plus you will need to pay a £15 or 15% (whichever is greater) cancellation fee. Our pricing structure rewards those that commit furthest in advance and we recommend customers hold the appropriate insurance to cover non-attendance for issues such as illness or travel problems. You can view our transfer policy hereTransfer requests can be made here. You can find full Terms and Conditions here.


By entering this event you agreed that you have entered in your own name (not nickname) and will bring photographic ID to event Registration to prove your identity. If you cannot prove your identity at that time then you won’t be able to complete race registration and therefore won’t be able to race. You also agreed that in such cases, no refunds will be given or transfers to future events offered.

Participants must be over 18 on the day of the event.