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  The Snowdonia Skyline                                           North Wales 

This is a 24 hour sky run taking in 24 summits and 16,000' of climbing on the north-east to south- west skyline of the Snowdonia National Park between Conwy and Nebo.  It involves running and scrambling across some 39 miles of high-level mountain terrain.  Support provisions can be obtained en-route at Ogwen, Pen-y-Pass, Yr Wydffa and Rhydu while the start and finish are connected by public transport.  It was devised and first completed by Chris Wearne in an unsupported run taking  23 hours 56 minutes in May  2014 which included a 3 hour bivvy on Foel Grach.


The object is to visit the 24 summits listed below starting near Conwy GR SH775778 and finishing near Nebo GR SH483500. Use OS Explorer map (1:25000): OL17 Snowdin/Yr Wyddfa

Caution:  The route includes seven grade one scrambles including Tryfan North Ridge, Bristly Ridge and Crib Goch.  While rock-climbing ability is not required runners need to ensure they have sufficient scrambling experience to negotiate exposed mountain ridges in unpredictable weather conditions.  Chris Wearne would be pleased to assist if further advice is needed, see below for contact details.


Click on the icon to view/print a pdf schedule of the inaugural traverse in May 2014


This is an informal challenge without rules, time limits or registrations.

Links and Further Information

  • Enquiries and reports - email:​​

  • The Snowdon Skyline - information sheet on the route compiled by Chris Wearne.Further advice on the route and the scrambling experience required can be obtained directly from Chris, see email address above.




UK Big 3 Rounds
Challenges by Region

Records & Logs


Route Index

Andy's  Southern Fells

Assynt Traverse
Bala Challenge

Bay Limestone Round

Bob  Baxter  Traverse
Bob Graham Round
Bowland Dozen
Bowland 1500’s
Broxap Round

Cairngorm Munros
Canary Islands 3 Peaks
Charlie Ramsay Round
Charnley Way

Cleveland Hills Challenge
Cuillin Round
Cumbrian Traverse
Dales Skyline
Dales Top Ten
Dales 2000’s

Dark Peak County Tops

Dark Peak 15 Trigs

Dartmoor Round

Denis Rankin Round

Dragon’s Tongue
Durham Hewitts

Etive Munros Round

Freeman Round

George Fischer Tea Round
Glen Lyon Corbett Round
Great North Inns Run
Harvey Howgill Tops

John Fleetwood Lakes 40

John Fleetwood Lakes Routes

John Fleetwood Scottish Routes

John Fleetwood Welsh Round

Joss Naylor Lakeland Challenge

Knoydart 7
Lakes 24

Lakes 25@25
Lakes 2500’s

Lakes Sea to Summits

Llangollen Hills Run

Loch  Lomond  Round

Leventon’s Line
Meirionnydd Round
National & Yorkshire 3 Peaks
No Cure Always Hope
Over The Hill Round
Paddy Buckley Round

Peak Traverses & Rounds

Pikes of the Lakes

Rigby Round - Cairngorms

Run the Line - Dales

Ring of Fire - Galloway

Saddleworth 10 Trigs
Scottish 4000’s
Six County Tops - Peak
Snowdonia Skyline
Snowdon to Pumlumon

South Pennine 39 Trigs
South Wales Traverse

Steve Parr Round

Tan Hill to Kirkstone Pass Inn
Tranter’s Round

Tyndrum Round
Upper Calder 13 Trigs
Wainwright 7 Summits

Wainwrights 30@30

Wicklow  Round
Yorkshire Round
Yorkshire 2000’s


More Challenges

Links & Articles

Sub-ultras (under 50 km)


Where there is a recorder please contact them to log your completion. In addition, or if there isn't a recorder, you are invited to share your experience on the gofar facebook page to encourage and inspire other runners to have a go!



All the routes on this site require proven mountain running experience. You undertake them entirely at your own risk. Please take full mountain safety precautions at all times.  Always ensure you carry sufficient clothing, food and equipment to cope with dramatic changes in the weather conditions!  Appropriate insurance cover is recommended.


The object of this website is to provide a single, ready source of information on the ultra-distance mountain challenges which have been developed over the past four or more decades. It now offers a diverse range of long and "short", old and recent, formal and informal routes from around the UK to encourage runners of all ages and abilities to have a go, subject to proven mountain experience in all conditions.




Please send details of any record-breaking runs and the like to Martin Stone who maintains records on behalf of the Fell Runners Association. Email:

Please also refer to the guidelines and definitions in the FRA Handbook.


If you can improve on the accuracy of this resource, spot any errors in grid references, names, heights, spelling or punctuation, or find a link which does not work please email Tony Wimbush.:

Similarly, if you wish to submit any new (or old) routes for inclusion see the contact page for the information and format that is required:. 

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