Ultramarathons in United Kingdom — 347 Races

By distance 227 50K · 91 50 mi · 22 100K · 4 100 mi

Biggest field Ultra-Trail Snowdonia - 50km — 965 finishers in 2025

Steepest course Old County Tops Fell Race — 166.7 m/km

Deepest results history Centurion Autumn 100 — 10 recorded editions

Next starts in United Kingdom

All 54 upcoming →

Fixed Distance50KRolling

GRIT 4.9

Beachy Head Ultra

Eastbourne, GBR

53 km 1,500 m D+ Oct 24

Fixed Distance50KVertical

GRIT 8.8

Endurancelife North York Moors

Ravenscar, GBR

55 km 4,050 m D+ Oct 24

Fixed Distance50 mi

GRIT 3.1

Jedburgh Three Peaks Ultramarathon

Jedburgh, GBR

61 km Oct 24

Fixed Distance50KVertical

GRIT 9.6

Nidderdale Way 32 miles

Ripley, GBR

51 km 4,700 m D+ Oct 24

Fixed Distance50 miVertical

GRIT 10

Nidderdale Way 55 miles

Ripley, GBR

88 km 7,500 m D+ Oct 24

Timed8 hours

GRIT —

Tentsmuir Forest 8-hour Challenge

Tentsmuir Forest, GBR

22 m D+ Oct 24

Fixed Distance50 miFast & Flat

GRIT 4.4

Thames Trail Ultra

Iffley, GBR

77 km 342 m D+ Oct 24

Fixed Distance50 miMountain

GRIT 9.7

Ultra England 50

Keswick, GBR

87 km 3,560 m D+ Oct 24

Fixed Distance50K

GRIT 2.4

Stort 30

Bishop's Stortford, GBR

48 km Oct 25

Timed24 hours

GRIT —

Possibly the smallest official BYU in the world

Morpeth, GBR

Oct 30

BackyardBackyard

GRIT —

Red On Backyard Ultra

Newton-le-Willows, GBR

Oct 30

Fixed Distance50KMountain

GRIT 5.8

Black Beacon Ultra Bach 50 km

Pontneddfechen, GBR

50 km 2,200 m D+ Oct 31