Ultra Marathons in United Kingdom
An ultramarathon or 'Ultra' is the term for any running event longer than the traditional marathon length of 42.195 kilometres (26.2 miles). Some of the most common distances are 50K, 100K and 100 miles. Ultra marathons are becoming increasingly popular, especially the off-road/trail and mountain running variants as well as the ultimate endurance event - the Last One Standing (LOS) or Backyard Ultra (BYU).
The following is a list of ultra marathons in United Kingdom.
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Events 1 to 100 of 287
BigMud Trails (EARTH)
Sunday, 22 February 2026Horndean, Hampshire, UK
North Downs Ridge 50K Trail Ultra
Sunday, 22 February 2026Denbies Wine Estate, Dorking, UK
St Peters Way Ultra Marathon
Sunday, 22 February 2026Chipping Ongar to Bradwell on Sea, Essex, UK
Badger Challenge: 6 Hour Running Race
Thursday, 26 February 2026Beacon Hill Country Park, Leicestershire, UK
Lulworth Cove Trail Runs
Saturday, 28 February 2026West Lulworth, Wareham, Dorset, UK
EnduranceLife Sussex
Saturday, 7 March 2026Helen Garden, Eastbourne, UK
Harrold-Odell 50K & 25K Trail Race
Saturday, 7 March 2026Harrold, Bedford, UK
Highland 8-hour Challenge
Saturday, 7 March 2026Glenmore, Scotland, UK
Humanity Direct Amersham Ultra
Saturday, 7 March 2026Amersham, UK
The Winter Green Man Ultra
Saturday, 7 March 2026Ashton Park School, Bristol, UK
Morland 'Marathon' Trail Ultra
Sunday, 8 March 2026Morland, Cumbria, UK
The Rosliston Rumble - Spring
Sunday, 8 March 2026Rosliston, Swadlincote, UK
Beast of the Blacks 10, 20 & 40 Mile
Saturday, 14 March 2026Longtown, Hereford, UK
D33 Deeside Way Ultra
Saturday, 14 March 2026Duthie Park, Aberdeen, UK
The JOGLE
Saturday, 14 March 2026 to Monday, 30 March 2026John O’Groats to Lands End, UK
Welcome Way Trail Race
Saturday, 14 March 2026Otley, West Yorkshire, UK
Hardmoors 55 Trail Ultra
Saturday, 21 March 2026Guisborough to Helmsley, Yorkshire, UK
London Lea Valley 50K Ultra & Gratitude 25K
Saturday, 21 March 2026Welwyn Garden City to Hackney Wick, East London, UK
Lone Wolf South East
Saturday, 21 March 2026 to Sunday, 22 March 2026Alice Holt Forrest, Bucks Horn Oak, Farnham, UK
The Ultra Loop - Heaton Park
Saturday, 21 March 2026Heaton Park, Manchester, UK
Winter's End Ultra & Marathon
Saturday, 21 March 2026Arundel to Winchester, UK
Canalathon Ultra
Sunday, 22 March 2026Sowerby Bridge, Yorkshire, UK
Elephant Challenge: 6 Hour Running Race
Tuesday, 24 March 2026Salcey Forest, Northampton, UK
Jurassic Coast Challenge
Friday, 27 March 2026 to Sunday, 29 March 2026Portland, Dorset, UK
Jurassic Coast 40 Miler
Saturday, 28 March 2026Weymouth, Dorset, UK
Rasselbock Backyard Ultra - Sherwood Pines
Saturday, 28 March 2026Sherwood Pines, Mansfield, UK
Running Tribe Race: March
Sunday, 29 March 2026Chalfont Park Sports Association, Chalfont St Peter, Gerrards Cross, UK
UK Ultra Springtide 50K & Half Marathon
Sunday, 29 March 2026Arundel, West Sussex, UK
Devilla 8-hour Challenge
Saturday, 4 April 2026Devilla Forrest, Fife, Scotland, UK
The Pendine Sands Races
Sunday, 5 April 2026Pendine Sands, Carmarthanshire, UK
Ripon Stinger Trail Race
Saturday, 11 April 2026Studley Roger, Ripon, North Yorkshire, UK
Rose of the Shires Ultra & Rosebud Marathon
Saturday, 11 April 2026Brixworth, Northampton, UK
SheUltra™
Saturday, 11 April 2026Abersoch to Pwllheli, North Wales, UK
The Calderdale Hike
Saturday, 11 April 2026Sowerby Bridge, Calderdale, West Yorkshire, UK
Battle of the Brampton Valley Way
Sunday, 12 April 2026Northampton, UK
Beast of the Beacons
Saturday, 18 April 2026Talybont-on-Usk, Brecon, UK
Chiltern Ridge Classic 50K
Saturday, 18 April 2026Berkhamsted to Wendover, UK
Cymoedd Sir Fynwy
Saturday, 18 April 2026 to Sunday, 19 April 2026Abergavenny, Monmouthshire, UK
Goathland V Trigs Ultra Challenge
Saturday, 18 April 2026Goathland, Whitby, North Yorkshire, UK
Rat Race Ultra Tour of Arran
Saturday, 18 April 2026 to Sunday, 19 April 2026Isle of Arran, Scotland, UK
Ultra X Spring Trail Series
Saturday, 18 April 2026Midhurst, West Sussex, UK
Bath & Bristol Railway Races Spring
Sunday, 19 April 2026Green Park, Bath, UK
Thames Ring 250
Wednesday, 22 April 2026 to Sunday, 26 April 2026Streatley-on-Thames, Reading, UK
Butcombe Trail Ultra
Saturday, 25 April 2026Mendip Activity Centre, Mendips, UK
EnduranceLife Pembrokeshire
Saturday, 25 April 2026Little Haven, Haverfordwest, UK
Forth Ultra & Team Relay
Saturday, 25 April 2026Helix Park, Falkirk, UK
The Medieval Backyard Ultra
Saturday, 25 April 2026Cosmeston Country Park, Penarth, UK
Total Coastal Ultra, Half Marathon & 10K
Saturday, 25 April 2026Kingswear to Shaldon, Devon, UK
Wold Rangers Way Ultra
Saturday, 25 April 2026Driffield, Yorkshire, UK
Clun Valley Trail Half Marathon
Sunday, 26 April 2026Guilden Down, Clun, UK
Eastnor Castle Backyard & Relay
Sunday, 26 April 2026Eastnor, Ledbury, Herefordshire, UK
Shakespeare Marathon & Half Marathon
Sunday, 26 April 2026Wood St, Stratford-upon-Avon, UK
Portland Pig BackYard Ultra
Friday, 1 May 2026Portland, UK
Bristol Backyard Ultra
Saturday, 2 May 2026Blaise Castle Estate, Bristol, South West, UK
Esk Valley Epic Trail Ultra
Saturday, 2 May 2026Glaisdale, Cumbria, UK
Fife Pilgrim Way Ultra Marathon
Saturday, 2 May 2026North Queensferry to St Andrews, Fife, UK
Maverick Exmoor X-Trail Run
Saturday, 2 May 2026Lynton, Devon, UK
The Malvern Hills Ultra
Saturday, 2 May 2026Abberley, Worcester, UK
Ultra X Scotland
Saturday, 2 May 2026 to Sunday, 3 May 2026Inverness to Dores, Scotland, UK
Marlborough Downs Challenge
Sunday, 3 May 2026Marlborough, Wiltshire, UK
BigWayRound Trail Run
Monday, 4 May 2026Winchester, Hampshire, UK
Bat Challenge: 6 Hour Running Race
Friday, 8 May 2026Beacon Hill Country Park, Leicestershire, UK
Brighton Backyard Ultra
Saturday, 9 May 2026Falmer, Brighton, UK
Canal Shuffle
Saturday, 9 May 2026Sampford Peverell, Tiverton, UK
Cateran Trail Ultramarathon
Saturday, 9 May 2026Glenshee, Perthshire, UK
Chiltern Hills 100K Ultra
Saturday, 9 May 2026Chesham, Buckinghamshire, UK
Dukeries 30/40
Saturday, 9 May 2026Walesby, Newark, Nottingham, UK
EnduranceLife Exmoor
Saturday, 9 May 2026Martinhoe, Exmoor, UK
Goring Gap Trails
Saturday, 9 May 2026 to Sunday, 10 May 2026Mapledurham, Reading, UK
Holy Trail Ultras
Saturday, 9 May 2026Oulton Broad, Lowestoft, Suffolk, UK
Kintyre Way Ultra
Saturday, 9 May 2026Tayinloan to Campbeltown, Scotland, UK
London 100K
Saturday, 9 May 2026Pimlico, London, UK
Run Rabbit Trail Festival
Saturday, 9 May 2026 to Sunday, 10 May 2026Deene Park Estate, Deene, Corby, UK
Run to the Sea Brighton
Saturday, 9 May 2026Horsham to Brighton, Sussex, UK
Spire Ultra
Saturday, 9 May 2026North Wingfield, Chesterfield, Derbyshire, UK
West Country Ultra
Saturday, 9 May 2026 to Sunday, 10 May 2026Taunton / Minehead, Somerset, UK
Sandstone Trail Challenge
Sunday, 10 May 2026Whitchurch to Frodsham, Cheshire, UK
Shires & Spires
Sunday, 10 May 2026Naseby, Northampton, UK
Bishop's Castle Trail Ultra
Saturday, 16 May 2026Bishop's Castle, Shropshire, UK
Kendal to Preston Ultra
Saturday, 16 May 2026Kendal to Preston, Lancashire, UK
Maverick Cotswolds Trail Run
Saturday, 16 May 2026Winchcombe, Gloucestershire, UK
Skipton Skedaddle Trail Race
Saturday, 16 May 2026Skipton, North Yorkshire, UK
WitchWood Trail Run
Saturday, 16 May 2026Inverkip, Greenock, Scotland, UK
Cape Wrath Ultra
Sunday, 17 May 2026 to Sunday, 24 May 2026Fort William to Cape Wrath, UK
Guernsey Ultra
Sunday, 17 May 2026Guernsey, Channel Islands, UK
Hardmoors 200 Trail Ultra
Friday, 22 May 2026 to Sunday, 24 May 2026Kingston upon Hull to Helmsley, Yorkshire, UKHardmoors 110 Trail Ultra
Saturday, 23 May 2026Filey to Helmsley, Yorkshire, UK
Kirkhill 8
Saturday, 23 May 2026Kirkhill Forest, Aberdeen, UK
PWR Endure Backyard Ultra Marathon
Saturday, 23 May 2026Tockington, Bristol, Gloucestershire, UK
The Fox Trail Ultra, Marathon & Half Marathon
Saturday, 23 May 2026Godalming, Surrey, UK
UK Ultra South Downs Half Marathon, 20 mile, 50K & 100K
Saturday, 23 May 2026Eastbourne, UK
Blair Castle Trail Weekender
Friday, 29 May 2026 to Sunday, 31 May 2026Blair Castle, Blair Atholl, UK
DNF Backyard Ultra
Friday, 29 May 2026Little Haywood, Staffordshire, UK
Beat The Sunset 50K Ultra
Saturday, 30 May 2026Maidenhead, Berkshire, UK
Maverick Peak District X-Trail Run
Saturday, 30 May 2026Bakewell, Derbyshire, UK
The Ridgeway Challenge & Ridgeway Chase
Saturday, 30 May 2026Ivinghoe Beacon to Avebury, UK
The Ultra Loop - Track Edition
Saturday, 30 May 2026Stockport, Manchester, UK
Three Castles 50km Ultra
Saturday, 30 May 2026Rochester to Tonbridge, Kent, UK
Peckham to Peckham Ultramarathon
Sunday, 31 May 2026Peckham, London to East Peckham, Kent, UK
Pembrokeshire Coastal Races
Friday, 5 June 2026 to Sunday, 7 June 2026Dale, Milford Haven, Wales, UK
Events 1 to 100 of 287