100 mile races
A hundred miles and up, roughly 160 km. A full night out, sometimes two, with cut-offs that mean it.
21 races
December 2026
1 raceJanuary 2027
2 races9
Jan
2027
Winter Spine Challenger South
Edale, Derbyshire · The Spine Race
Edale to Hardraw, the southern hundred of the Pennine Way in winter.
Event full
22
Jan
2027
Arc 100M
Coverack, Cornwall · Arc of Attrition by UTMB
Coverack to Perranporth along the whole arc of the Cornish coast, in January.
EXPERT
Entries open
March 2027
1 race
April 2027
1 raceMay 2027
5 races1
May
2027
Ultra X Scotland
Inverness, Highland · Ultra X
Seven race options on the Loch Ness trails, out of Inverness.
Entries open
1
May
2027
Thames Path 100
Richmond upon Thames, London · Centurion Running
Richmond to Oxford beside the river. The flattest hundred in Britain.
EXPERT
Entries open
22
May
2027
The Grim Reaper
Grimsthorpe Castle, Bourne · Bog Dog Running
10-mile estate loop at Grimsthorpe Castle run as 10, 40, 70 or 100 miles
Not open yet
£35–£160
22
May
2027
Hardmoors 110
Helmsley, North Yorkshire · Hardmoors
The Cleveland Way end to end, in one go.
Not open yet
29
May
2027
The Ridgeway Challenge 86
Ivinghoe Beacon, Buckinghamshire · Runaway Racing
The whole Ridgeway in one go, a hundred and forty kilometres from Ivinghoe Beacon to Avebury.
EXPERT
Entries open
June 2027
3 races5
Jun
2027
Ultra Scotland 100
St Johns Town of Dalry, Dumfries and Galloway · GB Ultras
A hundred miles of the Southern Upland Way.
EXPERT
Entries open
12
Jun
2027
South Downs Way 100
Winchester, Hampshire · Centurion Running
Winchester to Eastbourne, the whole National Trail in one go.
EXPERT
Entries open
12
Jun
2027
Summer Spine Challenger South
Edale, Derbyshire · The Spine Race
Edale to Hardraw, the southern hundred in summer.
Event full
July 2027
4 races17
Jul
2027
Summits of the North York Moors Ultra
Goathland Village Hall, Goathland · SilverBack Trails
A 120-mile loop of the highest hills on the Moors, from Goathland.
Not open yet
24
Jul
2027
Beacons Way Ultra 100
Abergavenny, Monmouthshire · GB Ultras
The full Beacons Way — a hundred miles, six thousand metres up.
EXPERT
Entries open
24
Jul
2027
Ultra X Wales
Abergavenny, Monmouthshire · Ultra X
A hundred miles down to 12km in the Bannau Brycheiniog.
Entries open
24
Jul
2027
Rat Race 100 Edinburgh
Edinburgh · Rat Race
A hundred miles from Edinburgh with forty-eight hours to finish it.
Entries open
August 2027
3 races7
Aug
2027
North Downs Way 100
Farnham, Surrey · Centurion Running
Farnham to Ashford, a hundred and three miles of the North Downs Way.
EXPERT
Not open yet
27
Aug
2027
UTL 100
Dunsop Bridge, Lancashire · Ultra Tour Lancashire
A hundred miles round the red rose county from the geographical centre of Britain.
EXPERT
Entries open
£209
28
Aug
2027
Rat Race 100 Glamis
Glamis, Angus · Rat Race
A hundred miles around Glamis in Angus, with forty-eight hours on the clock.
Entries open
September 2027
1 race
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