Distance guide

UK 100K ultramarathons

Race labels and measured course lengths do not always match exactly. This collection includes 100K-category events while displaying each organiser's current measured distance.

96 source-linked races

England Scotland Wales Northern Ireland Northern England Midlands Southern England South West South East London / Thames East of England Lake District Yorkshire 50K 50 mile 100K 100 mile

Decision guide

Choose by real demands

Marketed 100K races can publish different measured distances by edition. The card and race page retain the current sourced value rather than forcing false precision.

Latest recorded source check: 2026-10-28

Find my race Compare races Methodology

Next upcoming

6 supported records

50-mile range

1 supported record

Arc 100KLand's End · 51.4mi

100K range

95 supported records

First-ultra assessed

1 supported record

The WallCarlisle Castle, Carlisle · 69.6mi

Higher climbing

6 supported records

Technical terrain

8 supported records

Curated, not faceted

Compare the real demands

Use every filter

Saturday, 7 Nov 2026/entries closed

North Coast 110K Ultra

North Coast 110 / Exmoor Coast Ultra

Barnstaple · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance70.8 mi

AscentUnknown

Cutoff25h

5.5

Race For You difficulty

Hard

Unknown Unknown

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth West EnglandDevon / North Coast / Exmoor

View race

Friday, 13 Nov 2026/entry status unconfirmed

Druid's Challenge

Tring Rugby Club, Cow Lane, Tring · England

Event base · approximate postcode area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance83 mi

AscentUnknown

CutoffNo fixed limit

5.2

Race For You difficulty

Hard

Unknown Unknown

No fixed limit

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth Central EnglandThe Ridgeway, Chilterns and western Home CountiesXNRG multi-day ultras

View race

Saturday, 14 Nov 2026/entries open

Slate Trail Ultra

Porth Penrhyn harbour, Bangor · Wales

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance88.2 mi

Ascent4,200m*

Cutoff32h

6.3

Race For You difficulty

Hard

Unknown 29.6m/km

High pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

142KEryrislate trailmountain

View race

Saturday, 14 Nov 2026/entries closed

Winter Weavers' Way 100K

Winter Weavers' Way

Great Yarmouth to Cromer, Norfolk · England

Data Partial

Distance62.1 mi

AscentUnknown

Cutoff19h

5.3

Race For You difficulty

Hard

Unknown Unknown

High pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandEast of EnglandNorfolktrail

View race

Saturday, 21 Nov 2026/entries open

Peak District South & North 93K

Edale · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance57.8 mi

Ascent3,124m

CutoffUnknown

Race For You difficulty

Moderate

Unknown 33.6m/km

Low–moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern EnglandDerbyshire / Northern Peak DistrictMidlands and Central England

View race

Saturday, 21 Nov 2026/entries open

Copthorne 100K

Copthorne Races

Mickleham Village Hall · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data High

Distance61.8 mi

Ascent4,133m

Cutoff18h

5.4

Race For You difficulty

Hard

Unknown 41.6m/km

Very high pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth East EnglandSurrey Hillsnight running

View race

Saturday, 5 Dec 2026/entries open

SCOTT Sports Winter Cheviot Goat

Ingram · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance59 mi

Ascent3,962.4m*

Cutoff24h

5.3

Race For You difficulty

Hard

Unknown 41.7m/km

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern EnglandNorth East EnglandNorthumberland / Cheviot Hills

View race

Saturday, 5 Dec 2026/entries open

St Edmund Way Ultra

Manningtree to Brandon through Essex and Suffolk · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance80 mi

AscentUnknown

Cutoff28h

5.9

Race For You difficulty

Hard

Unknown Unknown

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandEast of EnglandEssex and Suffolkcanal

View race

Saturday, 12 Dec 2026/entry status unconfirmed

The 5 Trigs of Trigmas – 5 Trigs

Llanbenwch Caravan Park and Cafe, Wrexham Road, Ruthin · Wales

Event base · approximate postcode area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data High

Distance60.9 mi

Ascent3,827m

Cutoff24h

5.1

Race For You difficulty

Moderate

Unknown 39.1m/km

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

98KTrigmasClwydian Rangefully marked

View race

Saturday, 9 Jan 2027/entries open

Leeds Country Way Winter Ultras Both Days

Garforth Miners Welfare Hall, Garforth LS25 1AA · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance63.4 mi

Ascent1,450m*

CutoffUnknown

4.2

Race For You difficulty

Moderate

3 14.2m/km

High pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

EnglandYorkshire and the HumberWest YorkshireNorthern England

View race

Saturday, 23 Jan 2027/full

Arc 100K

Arc of Attrition by UTMB

Land's End · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance51.4 mi

Ascent2,708m

Cutoff16h

5.3

Race For You difficulty

Hard

8.1 32.7m/km

Very high pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

100KCornwallcoastaltechnical

View race

Saturday, 6 Feb 2027/entries open

The Big Loop 70

Sherwood Pines, Edwinstowe · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance70 mi

AscentUnknown

CutoffNo fixed limit

5.3

Race For You difficulty

Hard

Unknown Unknown

No fixed limit

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Midlands and Central EnglandNottinghamshireSherwood PinesThe Big Loop

View race

Saturday, 6 Feb 2027/entry status unconfirmed

Pilgrim Challenge

Farnham, Surrey · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance66 mi

AscentUnknown

CutoffUnknown

4.9

Race For You difficulty

Moderate

Unknown Unknown

Unknown

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth East EnglandSurrey and North Downs Way

View race

Saturday, 20 Mar 2027/entries open

Community Traverse Lakes Crossing

St Bees to Shap · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance62.1 mi

AscentUnknown

CutoffUnknown

5.7

Race For You difficulty

Hard

7 Unknown

Unknown

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern EnglandCumbriaLake District100K

View race

Sunday, 21 Mar 2027/entry status unconfirmed

NI and Ulster 100K Championship

Victoria Park, Belfast · Northern Ireland

Event venue · event venue. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance62.1 mi

AscentUnknown

CutoffUnknown

Race For You difficulty

Moderate

Unknown Unknown

Unknown

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern IrelandCounty Antrim, Causeway Coast and BelfastBelfastchampionship

View race

Friday, 26 Mar 2027/entry status unconfirmed

Jurassic Coast Challenge Three-Day

Charmouth · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance81.3 mi

AscentUnknown

CutoffUnknown

5.5

Race For You difficulty

Hard

Unknown Unknown

Unknown

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth Central EnglandDorset / Jurassic Coast

View race

Friday, 2 Apr 2027/entries closed

Rasus y Bannau 100K

Brecon town centre · Wales

Start · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data High

Distance64.6 mi

Ascent5,400m

Cutoff30h

5.6

Race For You difficulty

Hard

Unknown 51.9m/km

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

100K104KBannau Brycheiniog

View race

Saturday, 3 Apr 2027/limited places

Lakes Traverse

Northern Traverse

St Bees · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance62.1 mi

Ascent3,500m*

Cutoff26h 30m

5.7

Race For You difficulty

Hard

7.6 35m/km

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern EnglandCumbriaLake District100K

View race

Complete directory

All remaining records

The detailed cards above prioritise the next records in this collection. Every other permanent race route remains available here and through the full Explorer.

What is included?

This page includes 96 current discoverable race records matching the stated geography or distance definition: 96 fixed-distance and 0 format-defined. Cross-border families appear only once under their permanent identity.

How are facts checked?

Edition facts retain official-source URLs and a last-checked date. Unknown distance, ascent, cutoff or price is shown as unknown instead of being inferred from another year.

What can you compare here?

As of 7 Nov 2026, this collection has 96 selected fixed-distance race families: 95 with a confirmed start today or later and 1 without a confirmed future start in the selected record. There are also 0 current format-defined families, kept separate from fixed-distance comparisons. These counts describe this directory, not the whole market or places available.

Navigation options

fully marked: 44 of 95
partially marked: 9 of 95
self-navigation: 21 of 95
GPS required: 2 of 95
Navigation not recorded: 19 of 95

One recorded navigation mode per selected fixed-distance edition with a confirmed future start. Use the race record to check the organiser's requirements.

Course and format choices

26 of 95 are recorded as multi-stage; 69 use other fixed-distance formats. Recorded ascent is available for 54, and an overall cutoff or explicit no-fixed-limit statement for 49.

Most frequent recorded terrain labels: trail (87), mixed (75), moorland (27). Labels can overlap on the same course.

The denominator is the same 95 confirmed future starts. Terrain labels do not establish elevation, difficulty or an exact surface percentage.

Two navigation choices in this collection

These are the earliest confirmed future starts with two different recorded navigation modes, ordered by date then permanent identity. They show a choice to investigate, not a recommended order or a first-race suitability verdict.

North Coast 110K Ultra

Selected edition: 7 Nov 2026 · Barnstaple
Recorded course: 114km · ascent unknown
Navigation and support: self-navigation · semi-supported
Format and overall cutoff: continuous, point-to-point, single-stage · 25h

Catalogue source check: 2026-09-04. Open the race record for provenance and edition notes.

Official event information

Druid's Challenge

Selected edition: 13 Nov 2026 · Tring Rugby Club, Cow Lane, Tring
Recorded course: 133.58km · ascent unknown
Navigation and support: partially marked · aid stations
Format and overall cutoff: multi-stage · No fixed limit

Catalogue source check: 2026-09-04. Open the race record for provenance and edition notes.

Official event information

Compare navigation separately from ascent, surface and the overall time limit. A marked course still has organiser instructions to follow; a longer cutoff does not supply the skills needed for a self-navigated route.

Compare these race records

Build your shortlist

What belongs in the 100K collection?

The directory's 100K distance band covers 92km up to, but not including, 145km. This page also includes records whose race name contains 100K, even when their recorded distance is outside that band. This is a collection range, not a claim that every race measures exactly 100K. Each record retains its own known course distance.

A marketed 100K event can publish a different course length. Keep that recorded length visible when comparing ascent, navigation and the time limit. For stage races, check the format and individual stage information rather than reading the whole event window as running time.

Use Compare races to look at the same facts side by side. The methodology explains how course assessments and cutoff pressure differ from a personal finish estimate.

Choosing your first ultramarathon — questions to ask before you settle on a race.

Distance guide

UK 100K ultramarathons

Race labels and measured course lengths do not always match exactly. This collection includes 100K-category events while displaying each organiser's current measured distance.

96 source-linked races

England Scotland Wales Northern Ireland Northern England Midlands Southern England South West South East London / Thames East of England Lake District Yorkshire 50K 50 mile 100K 100 mile

Decision guide

Choose by real demands

Marketed 100K races can publish different measured distances by edition. The card and race page retain the current sourced value rather than forcing false precision.

Latest recorded source check: 2026-10-28

Find my race Compare races Methodology

Next upcoming

6 supported records

50-mile range

1 supported record

Arc 100KLand's End · 51.4mi

100K range

95 supported records

First-ultra assessed

1 supported record

The WallCarlisle Castle, Carlisle · 69.6mi

Higher climbing

6 supported records

Technical terrain

8 supported records

Curated, not faceted

Compare the real demands

Use every filter

Saturday, 7 Nov 2026/entries closed

North Coast 110K Ultra

North Coast 110 / Exmoor Coast Ultra

Barnstaple · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance70.8 mi

AscentUnknown

Cutoff25h

5.5

Race For You difficulty

Hard

Unknown Unknown

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth West EnglandDevon / North Coast / Exmoor

View race

Friday, 13 Nov 2026/entry status unconfirmed

Druid's Challenge

Tring Rugby Club, Cow Lane, Tring · England

Event base · approximate postcode area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance83 mi

AscentUnknown

CutoffNo fixed limit

5.2

Race For You difficulty

Hard

Unknown Unknown

No fixed limit

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth Central EnglandThe Ridgeway, Chilterns and western Home CountiesXNRG multi-day ultras

View race

Saturday, 14 Nov 2026/entries open

Slate Trail Ultra

Porth Penrhyn harbour, Bangor · Wales

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance88.2 mi

Ascent4,200m*

Cutoff32h

6.3

Race For You difficulty

Hard

Unknown 29.6m/km

High pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

142KEryrislate trailmountain

View race

Saturday, 14 Nov 2026/entries closed

Winter Weavers' Way 100K

Winter Weavers' Way

Great Yarmouth to Cromer, Norfolk · England

Data Partial

Distance62.1 mi

AscentUnknown

Cutoff19h

5.3

Race For You difficulty

Hard

Unknown Unknown

High pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandEast of EnglandNorfolktrail

View race

Saturday, 21 Nov 2026/entries open

Peak District South & North 93K

Edale · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance57.8 mi

Ascent3,124m

CutoffUnknown

Race For You difficulty

Moderate

Unknown 33.6m/km

Low–moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern EnglandDerbyshire / Northern Peak DistrictMidlands and Central England

View race

Saturday, 21 Nov 2026/entries open

Copthorne 100K

Copthorne Races

Mickleham Village Hall · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data High

Distance61.8 mi

Ascent4,133m

Cutoff18h

5.4

Race For You difficulty

Hard

Unknown 41.6m/km

Very high pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth East EnglandSurrey Hillsnight running

View race

Saturday, 5 Dec 2026/entries open

SCOTT Sports Winter Cheviot Goat

Ingram · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance59 mi

Ascent3,962.4m*

Cutoff24h

5.3

Race For You difficulty

Hard

Unknown 41.7m/km

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern EnglandNorth East EnglandNorthumberland / Cheviot Hills

View race

Saturday, 5 Dec 2026/entries open

St Edmund Way Ultra

Manningtree to Brandon through Essex and Suffolk · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance80 mi

AscentUnknown

Cutoff28h

5.9

Race For You difficulty

Hard

Unknown Unknown

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandEast of EnglandEssex and Suffolkcanal

View race

Saturday, 12 Dec 2026/entry status unconfirmed

The 5 Trigs of Trigmas – 5 Trigs

Llanbenwch Caravan Park and Cafe, Wrexham Road, Ruthin · Wales

Event base · approximate postcode area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data High

Distance60.9 mi

Ascent3,827m

Cutoff24h

5.1

Race For You difficulty

Moderate

Unknown 39.1m/km

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

98KTrigmasClwydian Rangefully marked

View race

Saturday, 9 Jan 2027/entries open

Leeds Country Way Winter Ultras Both Days

Garforth Miners Welfare Hall, Garforth LS25 1AA · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance63.4 mi

Ascent1,450m*

CutoffUnknown

4.2

Race For You difficulty

Moderate

3 14.2m/km

High pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

EnglandYorkshire and the HumberWest YorkshireNorthern England

View race

Saturday, 23 Jan 2027/full

Arc 100K

Arc of Attrition by UTMB

Land's End · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance51.4 mi

Ascent2,708m

Cutoff16h

5.3

Race For You difficulty

Hard

8.1 32.7m/km

Very high pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

100KCornwallcoastaltechnical

View race

Saturday, 6 Feb 2027/entries open

The Big Loop 70

Sherwood Pines, Edwinstowe · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance70 mi

AscentUnknown

CutoffNo fixed limit

5.3

Race For You difficulty

Hard

Unknown Unknown

No fixed limit

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Midlands and Central EnglandNottinghamshireSherwood PinesThe Big Loop

View race

Saturday, 6 Feb 2027/entry status unconfirmed

Pilgrim Challenge

Farnham, Surrey · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance66 mi

AscentUnknown

CutoffUnknown

4.9

Race For You difficulty

Moderate

Unknown Unknown

Unknown

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth East EnglandSurrey and North Downs Way

View race

Saturday, 20 Mar 2027/entries open

Community Traverse Lakes Crossing

St Bees to Shap · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance62.1 mi

AscentUnknown

CutoffUnknown

5.7

Race For You difficulty

Hard

7 Unknown

Unknown

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern EnglandCumbriaLake District100K

View race

Sunday, 21 Mar 2027/entry status unconfirmed

NI and Ulster 100K Championship

Victoria Park, Belfast · Northern Ireland

Event venue · event venue. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance62.1 mi

AscentUnknown

CutoffUnknown

Race For You difficulty

Moderate

Unknown Unknown

Unknown

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern IrelandCounty Antrim, Causeway Coast and BelfastBelfastchampionship

View race

Friday, 26 Mar 2027/entry status unconfirmed

Jurassic Coast Challenge Three-Day

Charmouth · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance81.3 mi

AscentUnknown

CutoffUnknown

5.5

Race For You difficulty

Hard

Unknown Unknown

Unknown

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Southern EnglandSouth Central EnglandDorset / Jurassic Coast

View race

Friday, 2 Apr 2027/entries closed

Rasus y Bannau 100K

Brecon town centre · Wales

Start · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data High

Distance64.6 mi

Ascent5,400m

Cutoff30h

5.6

Race For You difficulty

Hard

Unknown 51.9m/km

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

100K104KBannau Brycheiniog

View race

Saturday, 3 Apr 2027/limited places

Lakes Traverse

Northern Traverse

St Bees · England

Race area · approximate race area. Approximate race area. Check the organiser’s website for the exact start and race-day directions.

Data Partial

Distance62.1 mi

Ascent3,500m*

Cutoff26h 30m

5.7

Race For You difficulty

Hard

7.6 35m/km

Moderate pressure

Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy.

Northern EnglandCumbriaLake District100K

View race

Complete directory

All remaining records

The detailed cards above prioritise the next records in this collection. Every other permanent race route remains available here and through the full Explorer.

What is included?

How are facts checked?

Edition facts retain official-source URLs and a last-checked date. Unknown distance, ascent, cutoff or price is shown as unknown instead of being inferred from another year.

What can you compare here?

Navigation options

fully marked: 44 of 95
partially marked: 9 of 95
self-navigation: 21 of 95
GPS required: 2 of 95
Navigation not recorded: 19 of 95

One recorded navigation mode per selected fixed-distance edition with a confirmed future start. Use the race record to check the organiser's requirements.

Course and format choices

26 of 95 are recorded as multi-stage; 69 use other fixed-distance formats. Recorded ascent is available for 54, and an overall cutoff or explicit no-fixed-limit statement for 49.

Most frequent recorded terrain labels: trail (87), mixed (75), moorland (27). Labels can overlap on the same course.

The denominator is the same 95 confirmed future starts. Terrain labels do not establish elevation, difficulty or an exact surface percentage.

Two navigation choices in this collection

North Coast 110K Ultra

Selected edition: 7 Nov 2026 · Barnstaple
Recorded course: 114km · ascent unknown
Navigation and support: self-navigation · semi-supported
Format and overall cutoff: continuous, point-to-point, single-stage · 25h

Catalogue source check: 2026-09-04. Open the race record for provenance and edition notes.

Official event information

Druid's Challenge

Selected edition: 13 Nov 2026 · Tring Rugby Club, Cow Lane, Tring
Recorded course: 133.58km · ascent unknown
Navigation and support: partially marked · aid stations
Format and overall cutoff: multi-stage · No fixed limit

Catalogue source check: 2026-09-04. Open the race record for provenance and edition notes.

Official event information

Compare these race records

Build your shortlist

What belongs in the 100K collection?

Use Compare races to look at the same facts side by side. The methodology explains how course assessments and cutoff pressure differ from a personal finish estimate.

Choosing your first ultramarathon — questions to ask before you settle on a race.