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Flat Marathons in UK in September 2026

Find flat marathons in UK in September 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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We all love to be beside the seaside, so why not enjoy a trail marathon from the coast at Hornsea? You can grab yourself fish and chips and an ice cream from the front after the race.
  • Sat 5 Sep 2026
  • £39-£41
Hornsea, East Yorkshire, UK

Hip Hip Hooray it's Hornsea | Marathon

We all love to be beside the seaside, so why not enjoy a trail marathon from the coast at Hornsea? You can grab yourself fish and chips and an ice cream from the front after the race.

  • Chip timing
  • Enter online
  • Flat
  • Age 18 & over
  • 26.2 miles trail running + 322 ft ascent
Run 'The world's most scenic marathon' through London's greenest borough including Richmond Bridge and the Tow Path. Start inside the Kew Gardens with family fun music festival to finish!
  • Sun 13 Sep 2026
  • £49.50-£56.50
  • 5 charities
Richmond, UK

Richmond Marathon

Run 'The world's most scenic marathon' through London's greenest borough including Richmond Bridge and the Tow Path. Start inside the Kew Gardens with family fun music festival to finish!

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 18 & over
  • 26.2 miles road running + 160 m ascent
Get your Oompah vibe on and enjoy a trip up the Leeds and Liverpool Canal. A marathon to warm the depths of your heart along the flat, even towpath - this event is perfect for all abilities.
  • Sat 19 Sep 2026
  • £39-£41
Leeds, West Yorkshire, UK

Oktoberfest | Marathon

Get your Oompah vibe on and enjoy a trip up the Leeds and Liverpool Canal. A marathon to warm the depths of your heart along the flat, even towpath - this event is perfect for all abilities.

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Age 18 & over
  • 26.2 miles trail running + 210 ft ascent
Set along the beachfront promenade at Southbourne (SoBo), choose your own distance from 5K to ultra, along this flat, tarmacked, lapped route suitable for all abilities.
  • Sun 27 Sep 2026
  • £37.50-£39.50
Bournemouth, Dorset, UK

SoBo Series | Volume 4 | Stop me (if you think you've heard this one before)

Set along the beachfront promenade at Southbourne (SoBo), choose your own distance from 5K to ultra, along this flat, tarmacked, lapped route suitable for all abilities.

  • Beginner-friendly
  • Enter online
  • Flat
  • Traffic free
  • Event village
  • Coast
  • Public transport links
  • Age 18 & over
  • 7 hrs road running + 0 ft ascent
  • Sun 6 Sep 2026
Exeter, Devon, UK

City to Sea | Marathon

  • 26.2 miles trail running + 2400 ft ascent
  • Sun 13 Sep 2026
Brockenhurst, Hampshire, UK

The Garmin New Forest Marathon | Full Marathon

  • 26.2 miles multi terrain running + 160 ft ascent

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