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100K ultra runs in UK in September 2025

Find 100k ultra runs near me in UK in September 2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Love long distance trail running and the coast? Then you'll love this fantastic 100km trail running event which kicks off the Somerset & Exmoor Coast Festival.
  • Sat 28 Sep
  • £65
  • Entries closed
  • Sat 28 Sep
  • £65
  • Entries closed
Minehead, Somerset, UK

Somerset Coast Challenge | 100K

Love long distance trail running and the coast? Then you'll love this fantastic 100km trail running event which kicks off the Somerset & Exmoor Coast Festival.

  • Enter online
  • Age 16 & over
  • 100 km trail running
Walk, jog or run the stunning coastal paths of the Isle of Wight for a great charity cause, from the base camp at Chale, visiting historic Cowes and the iconic Needles en route.
  • Sat 3 - Sun 4 May 2025
  • £10-£40
  • 5 charities
  • Sat 3 - Sun 4 May 2025
  • £10-£40
  • 5 charities
Ventnor, Isle of Wight, UK

Isle of Wight Ultra Challenge

Walk, jog or run the stunning coastal paths of the Isle of Wight for a great charity cause, from the base camp at Chale, visiting historic Cowes and the iconic Needles en route.

  • Newcomers
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • GPS tracking
  • Fundraising required
  • Undulating
  • Event village
  • Age 14 & over
  • 1 day trail running
Walk, jog or run along the fabulous UNESCO World Heritage coastline for charity, starting at the picturesque Corfe Castle, with a range of distances to suit all abilities and full support too.
  • Sat 17 - Sun 18 May 2025
  • £10-£40
  • 8 charities
  • Sat 17 - Sun 18 May 2025
  • £10-£40
  • 8 charities
Wareham, Dorset, UK

Jurassic Coast Ultra Challenge

Walk, jog or run along the fabulous UNESCO World Heritage coastline for charity, starting at the picturesque Corfe Castle, with a range of distances to suit all abilities and full support too.

  • Newcomers
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • GPS tracking
  • Fundraising required
  • Undulating
  • Hilly
  • Event village
  • Age 14 & over
  • 1 day trail running
Walk, jog or run along the capital to coast route for charity, with a range of distance options available and superb support all the way, for all abilities and experience levels.
  • Sat 24 - Sun 25 May 2025
  • £10-£40
  • 8 charities
  • Sat 24 - Sun 25 May 2025
  • £10-£40
  • 8 charities
Brighton, East Sussex, UK

London 2 Brighton Ultra Challenge

Walk, jog or run along the capital to coast route for charity, with a range of distance options available and superb support all the way, for all abilities and experience levels.

  • Entertainment
  • Chip timing
  • Enter online
  • GPS tracking
  • Fundraising required
  • Undulating
  • Event village
  • Age 14 & over
  • 1 day trail running
Take on 50 historic miles across the beautiful Southern Upland Way - one of the greatest trails in the UK. Ultrarunners will tackle several ascents, pass through forests, valleys and by lochs.
  • Sat 7 Jun 2025
  • £99
  • Sat 7 Jun 2025
  • £99
Castle Douglas, Dumfries and Galloway, UK

Ultra Scotland 50

Take on 50 historic miles across the beautiful Southern Upland Way - one of the greatest trails in the UK. Ultrarunners will tackle several ascents, pass through forests, valleys and by lochs.

  • Enter online
  • GPS tracking
  • Hilly
  • Age 20 & over
  • 56 miles trail running + 2447 m ascent
Take on England’s finest countryside for charity, at your own pace, with stunning views en-route. With distances from 10km right up to 100km there’s a Lake District Challenge for everyone!
  • Sat 7 - Sun 8 Jun 2025
  • £10-£50
  • 7 charities
  • Sat 7 - Sun 8 Jun 2025
  • £10-£50
  • 7 charities
Kendal, Cumbria, UK

Lake District Ultra Challenge

Take on England’s finest countryside for charity, at your own pace, with stunning views en-route. With distances from 10km right up to 100km there’s a Lake District Challenge for everyone!

  • Newcomers
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • GPS tracking
  • Fundraising required
  • Undulating
  • Hilly
  • Event village
  • Urban
  • Rural
  • Age 14 & over
  • 1 day trail running
Test yourself for charity in the rolling hills of the Cotswolds featuring the Cotswold Way, trails and fabulous views, with routes from 10km right up to 100km there’s something for everyone!
  • Sat 21 - Sun 22 Jun 2025
  • £10-£50
  • 8 charities
  • Sat 21 - Sun 22 Jun 2025
  • £10-£50
  • 8 charities
Cirencester, Gloucestershire, UK

Cotswold Way Ultra Challenge

Test yourself for charity in the rolling hills of the Cotswolds featuring the Cotswold Way, trails and fabulous views, with routes from 10km right up to 100km there’s something for everyone!

  • Newcomers
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • GPS tracking
  • Fundraising required
  • Undulating
  • Hilly
  • Event village
  • Urban
  • Rural
  • Age 14 & over
  • 1 day trail running
Take on the full 100K Race to the King ultra marathon challenge in one go. Fully supported through day and night on a route combining castles and coastal scenery.
  • Sat 21 - Sun 22 Jun 2025
  • £165
  • 1 charity
  • Sat 21 - Sun 22 Jun 2025
  • £165
  • 1 charity
Chichester, West Sussex, West Sussex, UK

Race to the King | 100K Non-stop

Take on the full 100K Race to the King ultra marathon challenge in one go. Fully supported through day and night on a route combining castles and coastal scenery.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 4619 ft ascent
From the idyllic basecamp hub in Bakewell, charity challengers will head into the fabulous Peak District National Park on a route from 10 miles right up to the full 100km with full support!
  • Sat 28 - Sun 29 Jun 2025
  • £10-£50
  • 9 charities
  • Sat 28 - Sun 29 Jun 2025
  • £10-£50
  • 9 charities
Bakewell, Derbyshire, UK

Peak District Ultra Challenge

From the idyllic basecamp hub in Bakewell, charity challengers will head into the fabulous Peak District National Park on a route from 10 miles right up to the full 100km with full support!

  • Newcomers
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • GPS tracking
  • Fundraising required
  • Undulating
  • Hilly
  • Event village
  • Rural
  • Age 14 & over
  • 1 day trail running
Take on the full 100K Race to the Stones ultramarathon in one go. Fully supported through day and night on an incredibly scenic and historic route.
  • Sat 12 Jul 2025
  • £175
  • 2 charities
  • Sat 12 Jul 2025
  • £175
  • 2 charities
Watlington, Oxfordshire, UK

Race to the Stones | 100K Non-stop

Take on the full 100K Race to the Stones ultramarathon in one go. Fully supported through day and night on an incredibly scenic and historic route.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 3704 ft ascent
Take on the full 100K Race to the Stones ultramarathon with an overnight stop at the all-inclusive Basecamp, meaning a good nights' sleep in between the 50K stints.
  • Sat 12 Jul 2025
  • £255
  • 2 charities
  • Sat 12 Jul 2025
  • £255
  • 2 charities
Watlington, Oxfordshire, UK

Race to the Stones | 100K Two Days with camping

Take on the full 100K Race to the Stones ultramarathon with an overnight stop at the all-inclusive Basecamp, meaning a good nights' sleep in between the 50K stints.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 3704 ft ascent
Take on the full Race to the Stones 100K ultramarathon over two days, making your own arrangements for overnight accommodation at the halfway point.
  • Sat 12 Jul 2025
  • £165
  • Sat 12 Jul 2025
  • £165
Watlington, Oxfordshire, UK

Race to the Stones | 100K Two Days no camping

Take on the full Race to the Stones 100K ultramarathon over two days, making your own arrangements for overnight accommodation at the halfway point.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 3704 ft ascent
The South Downs National Park is a superb backdrop for a real charity challenge featuring Beachy Head, the Seven Sisters and the South Downs Way with a choice of distances from 25km right up to 100km!
  • Sat 6 - Sun 7 Sep 2025
  • £30-£50
  • 15 charities
  • Sat 6 - Sun 7 Sep 2025
  • £30-£50
  • 15 charities
Eastbourne, East Sussex, UK

South Coast Ultra Challenge

The South Downs National Park is a superb backdrop for a real charity challenge featuring Beachy Head, the Seven Sisters and the South Downs Way with a choice of distances from 25km right up to 100km!

  • Newcomers
  • Music
  • Chip timing
  • Enter online
  • GPS tracking
  • Fundraising required
  • Undulating
  • Event village
  • Urban
  • Rural
  • Coast
  • Age 14 & over
  • 1 day trail running
  • Sat 21 - Sun 22 Sep
Hawes, North Yorkshire, UK

Yorkshire 3 Peaks 70/100K Ultra | 100K

  • 100 km trail running
  • Sat 28 Sep
Crickhowell, Powys, UK

Beacons to the Blacks | 50 Mile Ultra

  • 50 miles trail running + 10442 ft ascent
  • Sat 28 Sep
Berwick-upon-Tweed, Northumberland, UK

Pilgrims Ultra | 100K

  • 100 km trail running
  • Fri 18 Oct
Lynmouth, Devon, UK

Two Moors Ultra and Coast to Castle | Coast to Castle - 100K

  • 100 km trail running
  • Sat 19 - Sun 20 Oct
High Peak, Derbyshire, UK

High Peak 70/100K Ultra | 100K

  • 100 km trail running
  • Sat 26 - Sun 27 Oct
Skipton, North Yorkshire, UK

Ultra Tour Yorkshire Dales (UTYD) 100K, 50K & 25K Challenge | 100K

  • 100 km trail running
  • Sat 26 Oct
Skipton, North Yorkshire, UK

Ultra Tour Yorkshire Dales (UTYD) 100K, 50K & 25K Challenge | 50K

  • 50 km trail running
  • Sat 23 Nov
Dorking, Surrey, UK

The Copthorne Races | 100K

  • 100 km trail running
  • Sat 26 Apr 2025
Prestatyn, Clwyd, UK

North Wales 50K & 100K | 100K

  • 100 km trail running
  • Sat 26 Apr 2025
Brighton, East Sussex, UK

Brighton to London Ultra

  • 100 km trail running + 1489 m ascent
  • Fri 2 May 2025
Portland, Dorset, UK

The Portland Pig BackYard Ultra

  • 4.17 miles trail running
  • Fri 4 - Sat 5 Jul 2025
Epping, Essex, UK

The Full Essex Way Ultra

  • 82 miles trail running + 2778 ft ascent

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