The steepest kilometre of every national trail
4 November 2026
The steepest kilometre on any national trail climbs 258 metres, about 1 in 4. It’s on Loch Lomond & Cowal Way, 1.6 miles into the Lochgoilhead to Inveruglas section. We measured the steepest kilometre of all 43 national trails and of every long-distance route, from the best heights there are for each.
The national trails
After Loch Lomond & Cowal Way, the steepest: Coast to Coast Path, 246 metres, 9.9 miles into the Ennerdale Bridge to Rosthwaite section. Then Romans and Reivers Route (197 metres), Pennine Way (190 metres) and Kintyre Way (188 metres). Half the national trails have a kilometre that climbs 117 metres or more. The gentlest is Formartine and Buchan Way, whose steepest kilometre climbs 27 metres, about 1 in 37.
Steeper still
Of all the long-distance routes, the steepest kilometre is on Mourne Wall Challenge: 330 metres, about 1 in 3, 2.2 miles into the Glasdrumman to Longstone section. Then Cambrian Way (308 metres), Three Peaks Walk (260 metres) and Loch Lomond & Cowal Way (258 metres).
County by county
The steepest kilometre of any long-distance path through each county: the steepest county is County Down, 330 metres on Mourne Wall Challenge, then Conwy (308 metres), Gwynedd (306 metres) and North Yorkshire (260 metres). The flattest: West Lothian, where the steepest kilometre climbs 4 metres.
The tables
How we measured
Heights are read every 10 metres along each section’s line from LIDAR, a survey of the ground to 2 metres, wherever it covers the section (from the Environment Agency, the Welsh Government and the Scottish Remote Sensing Portal), and every 50 metres from Ordnance Survey’s Terrain 50, or OSNI’s model in Northern Ireland, where it doesn’t. Those coarser models smooth out short, sharp climbs, so where a section has no LIDAR its steepest kilometre may be a little steeper than shown. The steepest kilometre is the most height gained between any two points up to a kilometre apart, walking the route the way we describe it, from its start to its finish; walked the other way, it’s the steepest descent. The gradient is the average over that kilometre, so parts of it are steeper.
National trails and long-distance routes only, whose line we have in full. Among the shorter walks, a few scrambles and errors in the heights give climbs no path has. A county’s steepest kilometre is on the section of a long-distance path that lies in it.
Use these figures
They’re free to use in print, online and on air. Please credit:
Adventure On Foot (adventureonfoot.co.uk), using data © OpenStreetMap contributors
and link to this page where you can. The figures come from OpenStreetMap, under the Open Database Licence, so the “© OpenStreetMap contributors” is part of the credit.
The tables in full, as spreadsheets (CSV): national, long-distance and counties.
These are the figures as of 4 November 2026. We work them out again when the routes or the map change, and keep every edition, so a figure quoted from an earlier one can still be checked.