Snowdonia Slate trail - Guided Run Challenge

  • Date 26/09/2020
  • Start 06:00
Ultra Marathon


A privately guided run challenge on this spectacular route, which takes in some of Snowdonia's finest scenery and industrial heritage.

Choose to go for the full 2 day challenge, or sign up for your preferred single day option...

This 83 mile circular trail contains 14250ft of ascent, and takes in some fantastic mountain and valley level scenery, and allows you to explore the industrial heritage of the slate villages throughout Snowdonia.

You’ll go away with a weekend’s worth of great views and memories - and a completion award. 

The route starts at Porth Penrhyn near Bangor and ends at Bethesda and takes in villages such as Llanllechid, Bethesda, Dinorwig, Llanberis, Waunfawr, Nantlle, Rhyd Ddu, Beddgelert, Croesor, Ffestiniog and Penmachno. We'll be guiding you around over the 2 days, with each day being around 40 miles in length - and there'll be the usual checkpoint support and backup provided, as on the rest of our supported challenges.

Day 1 - Bangor to Croesor (39.5 Miles) Start 6.30am at Porth Penrhyn

Day 2 - Croesor to Bethesda (43.5 Miles) Start 6.30am at Beddgelert

We are offering a limited number of spaces for this challenge, and will be providing the following, over the course of the 2 days, to make your journey along the trail, as safe, stress free and enjoyable as possible:

Fully Qualified Guides – Over 2 full days - leading you every step of the way – you’ll have no worries about getting lost, just relax and enjoy your surroundings and the challenge!

Checkpoint support – Each day is split into 6 sections – approximately 6-9 miles in length, and at the end of each one we’ll meet you with your spare gear should you wish to change your clothing policy, first aid provision and lots of food and drink to keep you going!

Safety and first aid cover – your in safe hands, your guides will be fully qualified when it comes to outdoor first aid, in addition we will have all the necassary skills and equipment to look after you if something goes wrong, at the end of each section.

Replenishment – Whilst it’s recommended that you carry some snacks and water on sections yourself, we’ll both provide and transport suitable foodstuffs and water/energy drinks and will have them waiting for you at the end of each section throughout the day.

Transport – If the worst happens and you can’t continue, through injury or fatigue – we’ll take care of getting you back to where you need to be. We’ll also carry any spare clothing/footwear or anything else (within reason!) that you may want at some point during the day. Anything that you feel you may need over the course of the challenge, we'll transport it for you in our vehicle. As the trail starts in Bangor, and finishes in Bethesda, those who have left their vehicle at the start, can be transported back to Bangor at the end of Day 2. You'll just have to take care of getting yourself to the start points for each daqy.

We will be averaging around 4mph moving pace – a brisk walking pace for most, with rest stops at each CP, so the emphasis is on keeping going, not speed! Think of walking briskly the climbs, jogging the flat sections and running the descents and you’ll end up with this average pace, or thereabouts. The pace will be dictated by the Run Leaders.


Day 1 61.3km/2035m

Bangor to Croesor - Meet 6.15am for a 6.30 start, Beach Road Car Park. Bangor. Postcode LL571DG

Leg 1 - Bangor to Bethesda 10.3km/325m

A nice easy start alongside the Ogwen river...nice and flat as we leave the coast behind on our journey towards the mountains. The going is pretty gentle, with a few hills that aren’t too taxing or steep, and the terrain easy underfoot. An interesting start that will warm you up nicely for greater challenges ahead!

Leg 2 - Bethesda to Llanberis 11.6km/360m

This section sees you climbing up to the village of Mynydd Llandegai, taking in a mixture of minor roads and pleasant riverside paths. Next, we cross the wild moor of Gwaun Gynfi - then easy paths to Parc Padarn, Llanberis and the heart of the Welsh Slate Industry.

Leg 3 - Llanberis to Nantlle 15.6km/580m

Climbing out of Llanberis, a mixture of lanes and tracks takes you over the lower slopes of Moel Eilio and down into Waun Fawr. Then, a lovely section below the towering mountains of Mynydd Mawr and the Nantlle Ridge...and a section through the Nantlle valley with outstanding views to Checkpoint 3 at the village of Nantlle. Toughest leg of the day...but just a couple of short ones to go!

Leg 4 - Nantlle to Rhyd Dudu 8.2km/260m

A relatively easy leg, along the bottom of this beautiful valley - which sees relatively few visitors. A climb towards the end and a section through some forestry has you at Rhyd Ddu village and the final checkpoint, in no time!

Leg 5 - Rhyd Ddu to Croesor 15.6km/510m

With over 50km in the legs, you probably won’t appreciate this toughie if a leg to finish day 1...but it is incredibly beautiful. Waymarked trails and forestry paths beneath the Hebog Ridge, and Beddgelert is reached easily before the climbing begins shortly afterwards and the village of Croesor marks the end of day 1! 

Day 2 72.9km/2280m

Croesor to Bethesda - Meet 5.45am for a 6am start at the National Park Car Park in the centre fo the village. Postcode LL486SR

Leg 1 - Croesor to Llan Ffestiniog 16km/720m

A real toughie to start your day..expect to be walking quite a bit of this does allow time to take in some amazing scenery! The surroundings get wilder, and things generally more strenuous from Croesor... a good track up to Croesor Quarry, after that the remote Rhosydd quarry is visited and then we drop down to Cwmorthin Lake. Then we are on the road for the descent to Tanygrisiau, and beyond one final climb up to Llyn Ffestiniog, is our first stop of the day.

Leg 2 - Llan Ffestiniog to Penmachno 21.3km/880m

The toughest leg of the entire weekend now...initially a climb up through the little visited Cwm Cynfal, then we are crossing the wild, open moorlands of the’ll be grateful for your guides as the navigation can be tricky, as well as the going tough! A descent through quarry workings to Cwm Penmachno, before a final climb and subsequent descent through forest, to the village of Penmachno and checkpoint 3.

Leg 3 - Penmachno to Betws-y-coed 8.6km/150m

A doddle compared to the last leg! See it as a bit of ‘active rest’ ....descending on broad forestry tracks and minor road to the Conwy Falls cafe, at the A5. Then some undulating woodland sections has you at Betws-y-coed. 

Leg 4 - Betws-y-coed to Capel Curig 9.5km/420m

An excellent section. Quite a hilly one, which your legs won’t appreciate at this stage of proceedings, but a pretty one nonetheless. A great riverside route passes the famous swallow falls and reaches the road at the ‘ugly house.’ Now, up steeply into the Gwydyr Forest, and on good woodland tracks, the views are fantastic, including the Snowdon Range and Moel Siabod, soon we’ll be droppin* down to Capel Curig for the final checkpoint of the day, and the challenge as a whole!

Leg 5 - Capel Curig to Bethesda 17.6km/110m

A long-ish leg to finish, but it’s really flat. We take the miners path into the Ogwen valley and the head of the Nantlle Francon Pass. A minor road descent beneath some of Snowdonia’s highest Mountains, then a section along the Ogwen cycleway will take you to the end of the challenge at Bethesda.


Snowdonia Slate trail - Guided Run Challenge Sep 2020

  • 26/09/2020, 06:00

    SST - Full Weekend

  • 26/09/2020, 06:00

    SST - DAY 1 (Bangor to Croesor)

  • 26/09/2020, 06:00

    SST - DAY 2 (Croesor to Bethesda)

  • 26/09/2020, 06:00

    SST - OutFit Members



Copyright OutFit Personal Fitness Ltd 2020