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Flat 50K ultra runs in South East

Find flat 50k ultra runs 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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Come and join the day of running and aim to complete an ultra 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
  • £33-£35
Egham, Surrey, UK

Boxing Day Challenge | Ultra Marathon

Come and join the day of running and aim to complete an ultra 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 20 & over
  • 32 miles trail running
Come and join The Racoon Rocket Run 50K and earn yourself a beautiful medal with an adorable picture of a fluffy raccoon on it! What more could you ask for?
  • Sat 14 Feb 2026
  • £23-£35
Staines, Surrey, UK

The Racoon Rocket Run | 50K

Come and join The Racoon Rocket Run 50K and earn yourself a beautiful medal with an adorable picture of a fluffy raccoon on it! What more could you ask for?

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km trail running
For this 50K ultra, not only will you earn a super cute rubber duck themed medal, but also your very own rubber ducky to take home with you!
  • Sat 21 Feb 2026
  • £23-£35
Staines, Surrey, UK

The Rubber Ducky Dash | 50K

For this 50K ultra, not only will you earn a super cute rubber duck themed medal, but also your very own rubber ducky to take home with you!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km trail running
Time to get nostalgic with the Wacky Run! I'm sure a lot of us can remember this fun cartoon and some of the crazy characters such as Dick Dastardly and Muttley, Penelope Pitstop and The Ant Hill Mob.
  • Sun 22 Feb 2026
  • £23-£35
Staines, Surrey, UK

The Wacky Run | 50K

Time to get nostalgic with the Wacky Run! I'm sure a lot of us can remember this fun cartoon and some of the crazy characters such as Dick Dastardly and Muttley, Penelope Pitstop and The Ant Hill Mob.

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
Here's an animal-inspired 50K ultra for you. The featured animal this time is a panda! The medal, as always, is incredible and definitely one to add to your collection!
  • Sat 7 Mar 2026
  • £23-£35
Staines, Surrey, UK

The Panda Plod | 50K

Here's an animal-inspired 50K ultra for you. The featured animal this time is a panda! The medal, as always, is incredible and definitely one to add to your collection!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km trail running
Come and join in The Sloth Scamper 50K where slow is the new fast and you can earn yourself a medal with an adorable sloth on to boot. Anyone know what a group of sloths is called?
  • Sat 14 Mar 2026
  • £23-£35
Staines, Surrey, UK

The Sloth Scamper | 50K

Come and join in The Sloth Scamper 50K where slow is the new fast and you can earn yourself a medal with an adorable sloth on to boot. Anyone know what a group of sloths is called?

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km trail running
Come and join The Flying Fox 50K event! Are you as cunning and as quick as a fox and fancy showcasing your running skills?
  • Sat 21 Mar 2026
  • £23-£35
Staines, Surrey, UK

The Flying Fox | 50K

Come and join The Flying Fox 50K event! Are you as cunning and as quick as a fox and fancy showcasing your running skills?

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km trail running
Come and join in for Dashing Dog Charity run along the picturesque River Thames, not only is the scenery beautiful and you will earn one of the awesome medals for your 50K!
  • Sun 22 Mar 2026
  • £25-£40
Staines, Surrey, UK

The Dashing Dog Charity Run | 50K

Come and join in for Dashing Dog Charity run along the picturesque River Thames, not only is the scenery beautiful and you will earn one of the awesome medals for your 50K!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
Whether you are in the love it or hate it camp, I think we can all agree that the 50K medal is super cute and definitely one which you need to add to your collection!
  • Sat 11 Apr 2026
  • £23-£35
Staines, Surrey, UK

Love it or Hate it Run | 50K

Whether you are in the love it or hate it camp, I think we can all agree that the 50K medal is super cute and definitely one which you need to add to your collection!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km trail running
Not made it into The London Marathon but still fancy getting a super awesome medal based on the iconic race set in the capital city? Come and enjoy a 50K instead!
  • Sat 18 Apr 2026
  • £23-£35
Staines, Surrey, UK

The London Run | 50K

Not made it into The London Marathon but still fancy getting a super awesome medal based on the iconic race set in the capital city? Come and enjoy a 50K instead!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km trail running
This Bank Holiday event is run 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.
  • Mon 4 May 2026
  • £16-£27
Staines, Surrey, UK

Bank Holiday Madness May

This Bank Holiday event is run 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.

  • Families
  • Beginner-friendly
  • Event village
  • All ages
  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
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 2026
  • £23-£35
Staines, Surrey, UK

The Spring Lucky Dip Run | 50K

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!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km trail running
Come and celebrate 50 years since the release of the iconic Rocky film! Have you got the Eye of The Tiger, the guts to get the glory and the will to rise up to the challenge and run 50K?
  • Sat 16 May 2026
  • £23-£35
Staines, Surrey, UK

Rocky at 50 Run | 50K

Come and celebrate 50 years since the release of the iconic Rocky film! Have you got the Eye of The Tiger, the guts to get the glory and the will to rise up to the challenge and run 50K?

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
Who remembers the character Strawberry Shortcake and all her adorable friends like Orange Blossom and Lemon Meringue?! Here's your chance for a medal of her for your 50K!
  • Sat 6 Jun 2026
  • £23-£35
Staines, Surrey, UK

Strawberry Shortcake Scamper | 50K

Who remembers the character Strawberry Shortcake and all her adorable friends like Orange Blossom and Lemon Meringue?! Here's your chance for a medal of her for your 50K!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
Come and join the Summer 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 7 Jun 2026
  • £23-£35
Staines, Surrey, UK

The Summer Lucky Dip Run | 50K

Come and join the Summer 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
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
Come and celebrate the 40th anniversary of the iconic film released in 1986! A cult classic from the 80s, one of Charlotte's favourite films, and who doesn't love David Bowie as the Goblin King!
  • Sun 14 Jun 2026
  • £23-£35
Staines, Surrey, UK

Labyrinth 40th Anniversary Run | 50K

Come and celebrate the 40th anniversary of the iconic film released in 1986! A cult classic from the 80s, one of Charlotte's favourite films, and who doesn't love David Bowie as the Goblin King!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
A run that you don't want to miss! The medal is incredible, and you can celebrate your achievements with some well-deserved ice cream!
  • Sun 5 Jul 2026
  • £23-£35
Staines, Surrey, UK

Will Run For Ice Cream | 50K

A run that you don't want to miss! The medal is incredible, and you can celebrate your achievements with some well-deserved ice cream!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
Who hasn't completed a race, sworn they will never run again and then booked onto another one the following day?!
  • Sat 11 Jul 2026
  • £23-£35
Staines, Surrey, UK

Ooops I Ran It Again | 50K

Who hasn't completed a race, sworn they will never run again and then booked onto another one the following day?!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
Who doesn't like cake?! The Great British Bake 50K Run is back for another year! The medal is a fantastic cupcake which doubles up as a magnet to go on your fridge!
  • Sun 9 Aug 2026
  • £23-£35
Staines, Surrey, UK

Great British Bake Run | 50K

Who doesn't like cake?! The Great British Bake 50K Run is back for another year! The medal is a fantastic cupcake which doubles up as a magnet to go on your fridge!

  • Enter online
  • Flat
  • Traffic free
  • Age 20 & over
  • 50 km road running
The second half option of the Thames Path Challenge from Runnymede along the meandering river through Cookham to Henley-on-Thames, home of the regatta, to a celebration finish and family BBQ!
  • Sat 12 - Sun 13 Sep 2026
  • £139
  • 12 charities
Egham, Surrey, UK

Thames Path Ultra Challenge | 2nd Half Challenge 50K

The second half option of the Thames Path Challenge from Runnymede along the meandering river through Cookham to Henley-on-Thames, home of the regatta, to a celebration finish and family BBQ!

  • Chip timing
  • Enter online
  • GPS tracking
  • Flat
  • Age 16 & over
  • 50 km trail running + 150 m ascent
Your chance to remember those who have given the ultimate sacrifice during conflicts around the world, with a two-minute silence and a run of your choice from 3K to ultra.
  • Sun 8 Nov 2026
  • £20-£37
Egham, Surrey, UK

Remembrance Day Run | South

Your chance to remember those who have given the ultimate sacrifice during conflicts around the world, with a two-minute silence and a run of your choice from 3K to ultra.

  • Families
  • Beginner-friendly
  • Event village
  • All ages
  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
  • Sun 21 Dec
Southsea, Hampshire, UK

Portsmouth Coastal Waterside Marathon Events | 50K Ultra

  • 50 km multi terrain running

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