10

Flat Ultra runs in September 2026

Find flat ultra runs near me in September 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

Filter by date

Filter by place

Filter by category

Map

Event listings

Select an event for photos, video, route, location, reviews, entry fees and how to enter.

Push your limits in this late-summer Thetford Backyard Ultra — run 4.167 miles every hour, on the hour, until only one runner remains standing.
  • Sat 12 Sep 2026
  • £80-£120
Brandon, Suffolk, UK

Thetford Back Yard Ultra Festival

Push your limits in this late-summer Thetford Backyard Ultra — run 4.167 miles every hour, on the hour, until only one runner remains standing.

  • Families
  • Beginner-friendly
  • Event village
  • Age 12 & over
  • Fixed time runs 2
  • Ultra run
Get your Oompah vibe on and enjoy a trip up the Leeds and Liverpool Canal. An ultra marathon to warm the depths of your heart along the flat, even towpath - this event is perfect for all abilities.
  • Sat 19 Sep 2026
  • £54-£56
Leeds, West Yorkshire, UK

Oktoberfest | Ultra Marathon

Get your Oompah vibe on and enjoy a trip up the Leeds and Liverpool Canal. An ultra 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 21 & over
  • 33 miles trail running + 243 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
  • Fri 11 - Sun 13 Sep 2026
London, UK

Thames Path Ultra Challenge

  • 100K ultra run 2
  • 50K ultra run 2
  • Trail run 4
  • Charity walk 4
  • Ultra run
  • + 1 more race

Other UK events

Search options

Back to search options
4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.