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Trail Half marathons in South East

Find trail half marathons in South East in 2025/2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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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 11 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 + 650 m ascent
An unforgettable race between the pines and beneath the majestic canopy of Bedgebury Forest - a trail race that will ignite your racer's heart.
  • Sun 19 Oct
  • £31
Goudhurst, Kent, UK

Bedgebury Forest Half Marathon

An unforgettable race between the pines and beneath the majestic canopy of Bedgebury Forest - a trail race that will ignite your racer's heart.

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running
Get involved in this spooky half marathon! The Care Bears were a staple of anyone who grew up in the 80s and even if you didn't like them, they make a super cute (slightly scary) medal to earn.
  • Sat 25 Oct
  • £23-£35
Staines, Surrey, UK

Scare Bear Run | Half Marathon

Get involved in this spooky half marathon! The Care Bears were a staple of anyone who grew up in the 80s and even if you didn't like them, they make a super cute (slightly scary) medal to earn.

  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 0 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 2 Nov
  • £30
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 + 1505 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 9 Nov
  • £26-£38
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 + 0 ft ascent
MoRunning brings everyday people together with the focus being to inspire you, your family, your kids and your friends to have the best time running! Get ready for the half marathon, Southampton!
  • Sun 9 Nov
  • £30-£35
Southampton, Hampshire, UK

Southampton MoRun | Half Marathon

MoRunning brings everyday people together with the focus being to inspire you, your family, your kids and your friends to have the best time running! Get ready for the half marathon, Southampton!

  • Chip timing
  • Enter online
  • Undulating
  • Age 17 & over
  • 13.1 miles trail running
The aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.
  • Fri 14 Nov
  • £20-£27
Staines, Surrey, UK

Midweek Chasing Numbers Nov | Half Marathon

The aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join the day of running and aim to complete a half marathon at your own pace on a scenic course then receive a fantastic Smurf-themed medal and goody bag at the finish!
  • Sun 16 Nov
  • £23-£35
Egham, Surrey, UK

Smurf Run | Half Marathon

Come and join the day of running and aim to complete a half marathon at your own pace on a scenic course then receive a fantastic Smurf-themed medal and goody bag at the finish!

  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Set in the stunning Wendover Woods, this is the perfect chance to challenge yourself over half marathon distance on scenic trails. Enjoy the fresh air, stunning views and rewarding trails.
  • Sun 23 Nov
  • £35
Tring, Buckinghamshire, UK

ATW Wendover Woods Trail Run | Half Marathon

Set in the stunning Wendover Woods, this is the perfect chance to challenge yourself over half marathon distance on scenic trails. Enjoy the fresh air, stunning views and rewarding trails.

  • Enter online
  • Undulating
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running
Get involved in this Lord of the Run Part 3 (LOTR) style run. Whether you love or hate it, come join in anyway by going on an Adventure across the Thames!
  • Sun 23 Nov
  • £23-£35
Staines, Surrey, UK

Lord of The Run Part 3 | Half Marathon

Get involved in this Lord of the Run Part 3 (LOTR) style run. Whether you love or hate it, come join in anyway by going on an Adventure across the Thames!

  • Enter online
  • Age 17 & over
  • 13.1 miles road running + 0 ft ascent
Join a December midweek half marathon and wear your most over-the-top Christmas jumper (optional) then receive a themed medal and goody bag too!
  • Fri 5 Dec
  • £20-£27
Staines, Surrey, UK

The Christmas Jumper Jaunt | Half Marathon

Join a December midweek half marathon and wear your most over-the-top Christmas jumper (optional) then receive a themed medal and goody bag too!

  • Enter online
  • Flat
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Welcome to a 7-hour timed running event where you can run a half marathon at your own pace on an out-and-back route, with fuel stations each lap, and a bobble hat, medal and goody bag at the finish.
  • Sat 6 Dec
  • £28-£40
Staines, Surrey, UK

A Christmas Carol Bobble Hat Run | Half Marathon

Welcome to a 7-hour timed running event where you can run a half marathon at your own pace on an out-and-back route, with fuel stations each lap, and a bobble hat, medal and goody bag at the finish.

  • Enter online
  • Flat
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join the morning of running and aim to complete a half marathon at your own pace on a scenic course with Christmas Dinner on route, present, themed medal and goody bag at the finish!
  • Thu 25 Dec
  • £23-£35
Egham, Surrey, UK

Christmas Day Cracker Run | Half Marathon

Come and join the morning of running and aim to complete a half marathon at your own pace on a scenic course with Christmas Dinner on route, present, themed medal and goody bag at the finish!

  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join the day of running and aim to complete a half marathon at your own pace on a flat, out-and-back route along the River Thames then receive a bespoke medal and goody bag at the finish!
  • Fri 26 Dec
  • £28-£30
Egham, Surrey, UK

Boxing Day Challenge | Half Marathon

Come and join the day of running and aim to complete a half marathon at your own pace on a flat, out-and-back route along the River Thames then receive a bespoke medal and goody bag at the finish!

  • Enter online
  • Flat
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join the day of running and aim to complete a half marathon at your own pace on a scenic course then receive a fantastic pick and mix medal and goody bag at the finish!
  • Sat 27 Dec
  • £23-£35
Staines, Surrey, UK

Year End Time Turner | Half Marathon

Come and join the day of running and aim to complete a half marathon at your own pace on a scenic course then receive a fantastic pick and mix medal and goody bag at the finish!

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join the day of running and aim to complete a half marathon at your own pace on an out-and-back route along the River Thames, then receive a medal and goody bag at the finish!
  • Wed 31 Dec
  • £33-£35
Egham, Surrey, UK

River Thames Run | Half Marathon

Come and join the day of running and aim to complete a half marathon at your own pace on an out-and-back route along the River Thames, then receive a medal and goody bag at the finish!

  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Yay it's 2026 and what better way to celebrate than running your first 5k/marathon/50k etc!!!
  • Thu 1 Jan 2026
  • £23-£35
Staines, Surrey, UK

New Years Day Run | Half Marathon

Yay it's 2026 and what better way to celebrate than running your first 5k/marathon/50k etc!!!

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Welcome to a 6-hour timed running event where you can run a half marathon at your own pace on an out-and-back route, with fuel stations each lap, and a Rhino medal and goody bag at the finish.
  • Sat 3 Jan 2026
  • £33-£35
Egham, Surrey, UK

Rhino Run | Half Marathon

Welcome to a 6-hour timed running event where you can run a half marathon at your own pace on an out-and-back route, with fuel stations each lap, and a Rhino medal and goody bag at the finish.

  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
The aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.
  • Fri 9 Jan 2026
  • £20-£27
Staines, Surrey, UK

Midweek Chasing Numbers Jan | Half Marathon

The aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and get involved in this Rise From The Ashes Run at The Last Hop in Staines, as long as you complete at least 3km you will be rewarded with one of the incredible phoenix medals!
  • Sat 10 Jan 2026
  • £23-£35
Staines, Surrey, UK

The Rise From The Ashes Run - South | Half Marathon

Come and get involved in this Rise From The Ashes Run at The Last Hop in Staines, as long as you complete at least 3km you will be rewarded with one of the incredible phoenix medals!

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join in Winter 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!
  • Sat 24 Jan 2026
  • £23-£35
Staines, Surrey, UK

The Winter Lucky Dip Run | Half Marathon

Come and join in Winter 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!

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
The aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.
  • Fri 6 Feb 2026
  • £20-£27
Staines, Surrey, UK

Midweek Chasing Numbers Feb | Half Marathon

The aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join in The Highland Hotfoot because who doesn't love those furry Highland Cows and therefore want a medal of them!!
  • Sat 7 Feb 2026
  • £23-£35
Staines, Surrey, UK

The Highland Hotfoot | Half Marathon

Come and join in The Highland Hotfoot because who doesn't love those furry Highland Cows and therefore want a medal of them!!

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join in The Racoon Rocket Run and earn yourself a beautiful medal with an adorable picture of a fluffy racoon on! What more could you ask for??
  • Sat 14 Feb 2026
  • £23-£35
Staines, Surrey, UK

The Racoon Rocket Run | Half Marathon

Come and join in The Racoon Rocket Run and earn yourself a beautiful medal with an adorable picture of a fluffy racoon on! What more could you ask for??

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
The Magna Carta Half Marathon is based in scenic Runnymede right near the historic site where the treaty of Magna Carta was agreed by King John of England and signed on 15th June 1215.
  • Sat 21 Feb 2026
  • £43-£45
Egham, Surrey, UK

Magna Carta Winter | Half Marathon

The Magna Carta Half Marathon is based in scenic Runnymede right near the historic site where the treaty of Magna Carta was agreed by King John of England and signed on 15th June 1215.

  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Age 17-80
  • 13.1 miles trail running + 110 ft ascent

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