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Trail Half marathons in South East

Find trail half marathons in South East in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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Come and join the Spring Lucky Dip Run! There is no set medal for this race; instead, you will get to choose your own from a selection of medals from past events!
  • Sun 10 May
  • £16-£35
Staines, Surrey, UK

The Spring Lucky Dip Run

Come and join the Spring Lucky Dip Run! There is no set medal for this race; instead, you will get to choose your own from a selection of medals from past events!

  • Beginner-friendly
  • Event village
  • All ages
  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
The UK’s favourite 24-hour trail race! Epic, Brutal, Relentless. Race against the clock to tackle as many laps of the iconic course as you can. How far can you go in 24 hours?
  • Sat 6 - Sun 7 Jun
  • £95-£105
  • Team places only
Reading, Berkshire, UK

Endure24 | Reading

The UK’s favourite 24-hour trail race! Epic, Brutal, Relentless. Race against the clock to tackle as many laps of the iconic course as you can. How far can you go in 24 hours?

Team places only

  • Dogs allowed at venue
  • Entertainment
  • Music
  • Ballot
  • Chip timing
  • Enter online
  • Event village
  • Event expo
  • Park
  • Free venue entry
  • Sustainability policy
  • Relay
  • Age 18 & over
  • 24 hrs multi terrain running
Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon on the same day was previously rated one of the top UK marathons.
  • Sat 13 Jun
  • £43-£45
Wadhurst, East Sussex, UK

Bewl Water Summer | Half Marathon

Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon on the same day was previously rated one of the top UK marathons.

  • Chip timing
  • Enter online
  • Hilly
  • Age 17-80
  • 13.1 miles trail running + 710 ft ascent
Come and conquer the Wendover Woods this summer and enjoy a scenic forest trail half marathon challenge to delight the senses.
  • Sun 14 Jun
  • £32
Tring, Buckinghamshire, UK

Wendover Woods Half Marathon

Come and conquer the Wendover Woods this summer and enjoy a scenic forest trail half marathon challenge to delight the senses.

  • Chip timing
  • Enter online
  • Hilly
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 1483 ft ascent
Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course at the same venue was previously rated one of the top UK marathons.
  • Sat 12 Sep
  • £43-£45
Wadhurst, East Sussex, UK

Bewl Water Autumn | Half Marathon

Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course at the same venue was previously rated one of the top UK marathons.

  • Chip timing
  • Enter online
  • Undulating
  • Age 17-80
  • 13.1 miles trail running + 710 ft ascent
The toughest trail run in the South East is back by popular demand. Likened to fell running, the 21K route includes steep, rocky ascent on lesser-known trails through the luscious Hurtwood Forest.
  • Sat 10 Oct
  • £35
Guildford, Surrey, UK

The Hurt | 21km

The toughest trail run in the South East is back by popular demand. Likened to fell running, the 21K route includes steep, rocky ascent on lesser-known trails through the luscious Hurtwood Forest.

  • Chip timing
  • Enter online
  • Hilly
  • Age 17 & over
  • 21 km trail running + 1551 ft ascent
Enjoy stunning coastal views on this flexible-distance run at Milford on Sea, following an out-and-back route beside Sturt Pond and the Isle of Wight — perfect for all abilities.
  • Sun 25 Oct
  • £37.50-£39.50
Lymington, Hampshire, UK

Wight Lines

Enjoy stunning coastal views on this flexible-distance run at Milford on Sea, following an out-and-back route beside Sturt Pond and the Isle of Wight — perfect for all abilities.

  • Beginner-friendly
  • Enter online
  • Flat
  • Event village
  • Coast
  • Public transport links
  • Age 18 & over
  • 7 hrs trail running + 47 ft ascent
An autumnal trail treat to delight the senses and lift your spirit as you clock the miles and enjoy the majestic beauty of Wendover Forest. See you there!
  • Sun 1 Nov
  • £33
Tring, Buckinghamshire, UK

Wendover Woods Half Marathon

An autumnal trail treat to delight the senses and lift your spirit as you clock the miles and enjoy the majestic beauty of Wendover Forest. See you there!

  • Enter online
  • Undulating
  • Age 17 & over
  • 13.1 miles trail running + 1483 ft ascent
Your chance to remember those who have given the ultimate sacrifice during conflicts around the world, with a two-minute silence, a half marathon, then a Remembrance medal, goody bag and special pin.
  • Sun 8 Nov
  • £25-£37
Egham, Surrey, UK

Remembrance Day Run | South | Half Marathon

Your chance to remember those who have given the ultimate sacrifice during conflicts around the world, with a two-minute silence, a half marathon, then a Remembrance medal, goody bag and special pin.

  • Enter online
  • Flat
  • Age 17 & over
  • 13.1 miles trail running
  • Fri 9 Jan
Staines, Surrey, UK

Midweek Chasing Numbers Jan | Half Marathon

  • 13.1 miles trail running
  • Fri 6 Feb
Staines, Surrey, UK

Midweek Chasing Numbers Feb | Half Marathon

  • 13.1 miles trail running
  • Sat 7 Feb
Portsmouth, Hampshire, UK

Portsmouth Coastal Half Marathon

  • 13.1 miles multi terrain running
  • Sun 8 Feb
Henley-on-Thames, Buckinghamshire, UK

The One in the Woods | Henley | Half Marathon

  • 13.1 miles trail running
  • Sun 22 Feb
Milton Keynes, Buckinghamshire, UK

The Milton Keynes 5K, 10K and Half Marathon Winter Warmer Run | Half Marathon

  • 13.1 miles trail running + 124 m ascent
  • Fri 6 Mar
Staines, Surrey, UK

Midweek Chasing Numbers Mar | Half Marathon

  • 13.1 miles trail running
  • Sat 7 Mar
Eastbourne, East Sussex, UK

EnduranceLife - Sussex | Half Marathon

  • 13.1 miles trail running + 2185 ft ascent
  • Sun 8 Mar
Dorking, Surrey, UK

Leith Hill Half Marathon

  • 13.1 miles trail running + 1778 ft ascent
  • Sun 22 Mar
Milton Keynes, Buckinghamshire, UK

Twin Lakes 20 | 20 Mile

  • 20 miles multi terrain running
  • Sun 29 Mar
Arundel, West Sussex, UK

Springtide Half Marathon

  • 13.5 miles trail running + 1175 ft ascent
  • Fri 17 Apr
Staines, Surrey, UK

Midweek Medal Madness Run April | Half Marathon

  • 13.1 miles trail running
  • Sun 19 Apr
Basingstoke, Hampshire, UK

Dell 10K & Half Marathon | Half Marathon

  • 13.1 miles trail running
  • Fri 1 May
Egham, Surrey, UK

Midweek Chasing Numbers May | Half Marathon

  • 13.1 miles trail running
  • Sun 10 May
Reading, Berkshire, UK

Goring Gap Trails | Run - Half Marathon

  • 13.1 miles trail running + 102 m ascent
  • Sun 10 May
Polegate, East Sussex, UK

The Rathfinny Run 10.7K and Half Marathon | Half Marathon

  • 21.4 km trail running
  • Sat 23 May
Eastbourne, East Sussex, UK

Seven Sisters Half Marathon

  • 13.1 miles trail running + 2057 ft ascent

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