Britain has a network of waymarked long-distance paths, publicly maintained and free to use, that between them carry most of the country's ultra calendar. Understanding which trail a race is on tells you more about it than the distance does — the ground, the navigation, the exposure and the character all come from the path rather than the organiser.
The South Downs Way
100 miles of chalk ridge from Winchester to Eastbourne, entirely on bridleway, and the most raced trail in southern England. It is fast, open, waymarked and completely exposed — there is essentially no shelter along the whole ridge, which makes wind the deciding variable.
Centurion's South Downs Way 50 runs the eastern half from Worthing to Eastbourne in April: 5,700ft of ascent across 50 miles, a 13-hour cut-off and seven aid stations. Winter's End covers the western half towards Winchester in March. Between them, the whole trail is raced by two events three weeks apart.
The North Downs Way
The South Downs Way's more wooded sibling, running from Farnham to Dover. Centurion's North Downs Way 50 covers Farnham to Knockholt Pound with 5,600ft of climb — a near-identical total to the South Downs 50, delivered on rootier, more technical, more enclosed ground. Box Hill and Colley Hill are the climbs people remember.
The trail also carries the Pilgrim Challenge, 66 miles over two days in February, and the North Downs Ridge 50K.
The Ridgeway
Britain's oldest road, running 87 miles from Ivinghoe Beacon to Avebury across chalk downland. It carries the largest first ultra in the country and the purest version of the same route.
- Race to the Stones covers 100km of it from Lewknor to the Avebury stone circle each July, with seven pit stops, bag transfer and a finish rate above 90%. It is the most common first 100km in Britain.
- The Ridgeway Challenge runs the full 86 miles from Ivinghoe Beacon to Avebury in one push, through the night, permitted by the Trail Running Association.
- XNRG's Druid's Challenge covers 84 miles of the same trail over three days in November with indoor overnight stops.
Three races, one trail, three completely different propositions — supported day event, through-the-night race, or staged multi-day.
The Pennine Way
268 miles from Edale to Kirk Yetholm, the first national trail in Britain and the hardest. Peat bog, flagstone, Cross Fell, Hadrian's Wall and the Cheviots, with around 10,700m of ascent end to end.
It carries the Montane Spine, which runs the whole thing in January with a 156-hour limit, and a Summer Spine over the same route in June. The Challenger races cover the southern 108 miles to Hawes and the northern 160 to Kirk Yetholm. All of them require entrants to be 21 or over with a 60-mile ultra behind them.
The Cleveland Way
110 miles around the North York Moors and down the Heritage Coast, and the trail an entire race series is built on. The Hardmoors events cover it in pieces: the 55 from Guisborough to Helmsley across the moorland half, the 60 down the coast to Filey, and the 110 doing the whole thing in one go with a 36-hour limit. The Hardmoors 160 adds the Tabular Hills.
Wainwright's Coast to Coast
Not an official national trail for most of its life, and arguably the most famous long path in England: 300km from St Bees on the Irish Sea to Robin Hood's Bay on the North Sea, crossing the Lake District, the Yorkshire Dales and the North York Moors with 6,500m of ascent.
Ourea's Northern Traverse runs the whole thing self-supported. The Lakes Traverse takes the first 100km across the Lakes with a 28-hour limit, the Dales Traverse the middle 55km from Kirkby Stephen, and the Moors Traverse the final 80km to the sea.
The others worth knowing
- The West Highland Way — 95 miles from Milngavie to Fort William, carrying the Highland Fling over the southern 53 and the West Highland Way Race over the whole thing.
- The Cotswold Way — 102 miles of limestone escarpment from Chipping Campden to Bath, raced as the Cotswold Way Century.
- The Thames Path — flat towpath, and the reason the Thames Path Challenge and Autumn 100 exist.
- The Gritstone Trail, the Wolds Way, the Calderdale Way, the Leeds Country Way and dozens of regional trails, each with a race that runs its full length in a day.
Why this matters when picking a race
The trail tells you what the day will be. A chalk-ridge race is fast, exposed and wind-dependent. A Pennine race is peat, navigation and weather. A towpath race is flat, relentless and hard on the legs precisely because nothing ever changes. A coast-path race is a saw-tooth of short steep climbs regardless of what the total ascent suggests.
It also means you can recce properly. These are public rights of way, waymarked and open all year — which is a real advantage British ultra runners have over almost anywhere else, and one that surprisingly few of them use.