Race organisers
The people who put these races on. Each one has a page listing everything they run, so you can find the next one rather than the next thing that happens to be nearby.
13 Valleys Ultra
Keswick, Cumbria · Lake District
The thirteen valleys of the Lake District, linked
27th Derby Scouts
Chaddesden, Derby
The Wilmot Wander, thirty-two miles round Derby every January
Always Aim High Events
Llanberis, Gwynedd
Mountain and coastal racing in North Wales, in Welsh and English
AND-OVER Trail Events
Andover, Hampshire · Hampshire
Tough trail running events on stunning routes
Andali Events
Ludlow, Shropshire · Shropshire
Run the line, hear the howl
Arc of Attrition by UTMB
Cornwall
Winter racing on the Cornish coast path
Bala & Penllyn Rotary Club
Bala, Gwynedd · Eryri (Snowdonia)
Woody's Rotary Bala Challenge, three hill routes round Llyn Tegid every May
BigFeat Events
Hampshire (from the task brief; the organiser's own site could not be read to confirm) · Hampshire
Challenge you, awaken you and inspire you
Black Sheep Events
Llŷn Peninsula, Gwynedd · Gwynedd
Coastal ultras, pilgrim trails and a women-only 50k on the Llŷn Peninsula
Blast Running
Edinburgh, Scotland · Edinburgh
Your race, your pace
Bog Dog Running
Stamford, Lincolnshire · Lincolnshire
Never sit still
Boghopper Races
Norfolk
Beginner-friendly trail ultras on the Norfolk and Suffolk long-distance paths
Cardiff Outdoor Group
Cardiff
The South Wales Three Peaks Trial, the oldest challenge walk in the UK
Centurion Running
South East England
Marked and fully supported 50 to 200 mile ultras
Channel Events
The Adventure Centre, Warren Road, Minehead, Somerset, TA24 5BG · Exmoor
Getting more people active outdoors
Charm Bracelet Trail Events
Cath and Tim's coastal and fell races, from 10K to 104 miles.
Cold Brew Events
Ingram, Northumberland · Northumberland
Northumberland trail and ultra running, mostly in the dark
COPSE
Croydon
Croydon Outdoor Pursuits and Social Events Club, home of the Gatliff Marathon
Cragg Runner
Midgley, Calderdale
Fell and moorland races across the South Pennines, from a four-mile dash to fifty miles
Due North Events
Yorkshire Dales
Trail races in the Yorkshire Dales
Durty Events
Scotland
The Lake District end to end, and a half of it
Eden Runners
Penrith, Cumbria · Lake District
Penrith club, road and fell
Eightmile Events
Dorset
Chase that feeling.
Endurancelife
Kingsbridge, Devon
The Coastal Trail Series — 10K to ultra, round the edge of Britain.
Epic Endurance Events
Portland, Dorset
A marathon a day along the coast path
Eryri by UTMB
Llanberis, Gwynedd · Eryri (Snowdonia)
The UTMB World Series event in Snowdonia
Events of the North
North East England · Northumberland
Home of Britain's Most Beautiful Marathon
Excalibur Trail Races
Clwydian Range, near Ruthin and Mold · Clwydian Range
Britain's toughest trail races? Try it yourself
GB Ultras
Warrington, Cheshire · Cheshire
Big-mileage point-to-point ultras, from 50 miles to 215.
Go Beyond Events
Northamptonshire
Amazing Events for Amazing People
Good Running Events
Norfolk (East Anglia) · Chilterns
Creating Good Running Events
Great Owl Running
Leeds, West Yorkshire · West Yorkshire
Trail races on Leeds's favourite footpaths, kept simple and affordable
Hardmoors
North York Moors
Rise to the challenge
Heights Ultra Trail
Linthwaite, Huddersfield (Colne Valley), West Yorkshire · South Pennines
Working together to reach new heights
High Terrain Events
Scottish Highlands
Trail races from the Tweed Valley to the Cairngorms, and two in the Lakes
Highland Fling Race
Milngavie, East Dunbartonshire
Fifty-three miles of the West Highland Way, every year since 2006
It's Grim Up North Running
West Yorkshire
Low-key canal and trail races across Yorkshire most weekends, 5k to ultra, with a bespoke medal and a bag of sweets
Lake District Sky Trails
Penrith, Cumbria · Lake District
Skyrunning in the Lakes — ridges, scrambles and vertical kilometres.
Lakeland Trails
Ambleside, Cumbria · Lake District
Trail running for everyone, in the Lake District
LDWA Beds, Bucks & Northants
Long Distance Walkers Association challenge events in Bedfordshire, Buckinghamshire and Northamptonshire
LDWA Cornwall & Devon
Long Distance Walkers Association challenge events in Cornwall, Devon and Somerset
LDWA Dorset
Long Distance Walkers Association challenge events in Dorset
LDWA East Lancashire
Long Distance Walkers Association challenge events in East Lancashire and the West Pennine Moors
LDWA East Yorkshire
Long Distance Walkers Association challenge events in East Yorkshire and the Wolds
LDWA Essex & Herts
Long Distance Walkers Association challenge events in Essex and Hertfordshire
LDWA Heart of England
Long Distance Walkers Association challenge events in Warwickshire and Worcestershire
LDWA High Peak
Long Distance Walkers Association challenge events in the Peak District
LDWA Kent
Long Distance Walkers Association challenge events in Kent
LDWA Lakeland
Long Distance Walkers Association challenge events in the Lake District
LDWA London
Long Distance Walkers Association challenge events in London
LDWA Marches
Long Distance Walkers Association challenge events in Shropshire and the Welsh Marches
LDWA Nidderdale
Long Distance Walkers Association challenge events in Nidderdale and the Washburn valley
LDWA Norfolk & Suffolk
Long Distance Walkers Association challenge events in Norfolk and Suffolk
LDWA North Yorkshire
Long Distance Walkers Association challenge events in North Yorkshire
LDWA Sherwood
Long Distance Walkers Association challenge events in Nottinghamshire and Leicestershire
LDWA South Manchester
Long Distance Walkers Association challenge events in south Manchester and the Peak fringe
LDWA South Pennine
Long Distance Walkers Association challenge events in the South Pennines
LDWA South Wales
Long Distance Walkers Association challenge events in South Wales
LDWA Staffordshire
Long Distance Walkers Association challenge events in Staffordshire and the White Peak
LDWA Surrey
Long Distance Walkers Association challenge events in Surrey
LDWA Thames Valley
Long Distance Walkers Association challenge events in the Thames Valley and Chilterns
LDWA The Irregulars
Long Distance Walkers Association challenge events in Kirklees and the Holme Valley
LDWA West Lancashire
Long Distance Walkers Association challenge events in West Lancashire
LDWA West Yorkshire
Long Distance Walkers Association challenge events in West Yorkshire
Limitless Trails
Crickhowell, Powys
Big-climb ultras in the Black Mountains, the Beacons and Mid Wales
Maverick Race
Trail, Gravel and X-Trail series — five distances off one start line.
NAV4 Adventure
Askham, Cumbria · Lake District
The people who teach navigation, putting on races that need it
Northern Fells Running Club
Hesket Newmarket, Cumbria · Lake District
A Lake District club with three fell races of its own
OuterEdge Events
Devon · Dartmoor
Designed for runners, by runners
Outsider Events
Edinburgh · Loch Lomond & The Trossachs
Trail running and gravel events in Scotland
Prosper Events
Taunton, Somerset · Somerset
Do More - Go Further - Aim Higher
Punk Panther
Otley, West Yorkshire · Airedale
Challenge your limits
Race Harborough
Market Harborough, Leicestershire · Leicestershire
Quality, friendly, inclusive events in beautiful surroundings
Racing Line Running
Mortimer, Berkshire · Berkshire
Ales & Trails
Ranger Ultras
Peak District
Low-key, big-enjoyment, great-value
Rat Race
Thirsk, North Yorkshire
Big, waymarked, fully supported adventures
Relish Running Races
Batheaston, Bath · Somerset
Friendly races in special places across the South West
Ridge Runners
Cardiff
Races by runners, for runners
Rombalds Stride
Guiseley, West Yorkshire
Twenty-three miles over Rombalds Moor and the Chevin every February
Rory Macpherson Ltd (G3 Run Series and The Hurt)
Dorking, Surrey (registered office); races near Guildford · Surrey
Three races. One community. Since 2004.
Rotherham Harriers
Rotherham, South Yorkshire
Round Rotherham, fifty miles through the South Yorkshire Forest since 1983
Run And Ride Ltd
Milford, Stafford, Staffordshire · Cannock Chase
Running & Cycling Events from the team at Run & Ride
Run JMC
Burnley, Lancashire
Off-road ultras on the Burnley Way, the Pendle Way and the Panopticons
Run Nation
Newcastle upon Tyne · Tyne and Wear
Getting the nation running
Runaway Racing
Chilterns
Marked trail ultras and halves in the Chilterns, an hour from London
RunThrough Trails
Trail weekends with three distances off one start line, UK and Europe.
She Strides Events
Hebden Bridge, West Yorkshire · South Pennines
Trail races, ultras and running challenges in the heart of Hebden Bridge
Shropshire Hills Discovery Centre
Craven Arms, Shropshire
The Shropshire Way 80K Festival, run by the charity Grow Cook Learn
SilverBack Trails
Glaisdale, North Yorkshire · North York Moors
Beyond the comfort zone
Superhuman Sports
Bristol
Creators of world-class events since 2013
The Bath Beat
Bath
A walking and running event from Bath, twelve and a half to twenty-six and a half miles
The Fellsman
Ingleton, North Yorkshire · Yorkshire Dales
Ingleton to Threshfield the hard way
The Lap
Windermere, Cumbria · Lake District
A lap of Windermere, twice a year, both ways round
The Spine Race
Edale, Derbyshire · Peak District
Britain's most brutal
Three Forts Challenge
Lancing, West Sussex · South Downs
The Tough One
Three Peaks Race
Horton in Ribblesdale, North Yorkshire · Yorkshire Dales
The classic, since 1954
Threshold Trail Series
Big-field ultras on England's oldest paths
Thunder Races
Bedford, Bedfordshire · Bedfordshire
Fully marked, fully supported trail and ultra races in Bedfordshire, built for first-timers
Trail Blazing Events
North West England (events centred on Rivington/Horwich, Lancashire) · Lancashire
We're not just organising races, we're creating adventures
Trail Outlaws
North East England · Northumberland
Fun and challenging trail races from 10K to Ultra
UK Running Events
Hampshire
RunRebel trail running series
Ultra Challenge
The UK's biggest series of treks and trail runs — walk, jog or run, fully supported
Ultra Running Ltd
United Kingdom
The Myths and Legends series, a day at a time
Ultra Tour Lancashire
Dunsop Bridge, Lancashire · Forest of Bowland
The red rose county, on foot
Ultra X
Multi-distance trail weekends, from a 12km dash to a hundred miles.
Up and Running Events
Glasgow, Scotland · South Lanarkshire
Races that welcome every runner
UPrevail Events
Teesside (events at Guisborough, Yarm, Croft and Bishopton); no office address printed · North York Moors
Push Forward, Prevail in Every Adventure
Wild Deer Events
North East England
Trail runs round castles, estates and forests
Wild Running
Devon · Dartmoor
Specialists in trail running and swimrun adventures
Wilderness Development
Sheffield · Peak District
The Peak District Challenge: 25km to 100 miles from Hathersage in a day
Put on a race and want it listed? Tell us about it.