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Marathons with PB potential in UK in September 2026

Find marathons with pb potential 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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Select an event for photos, video, route, location, reviews, entry fees and how to enter.

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
  • £49.50-£56.50
Richmond

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!

  • 26.2 miles road running + 160 m ascent
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 18 & over
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
  • £39-£41
Leeds, West Yorkshire

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.

  • 26.2 miles trail running + 210 ft ascent
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Age 18 & over
Flat, fast and an ideal setting for those aiming to achieve a personal best and is a great choice when looking for a marathon that is eligible for good for age for the London Marathon.
  • Sun 27 Sep
  • £35-£37
Barnstaple, Devon

RUN Barnstaple | Marathon

Flat, fast and an ideal setting for those aiming to achieve a personal best and is a great choice when looking for a marathon that is eligible for good for age for the London Marathon.

  • 26.2 miles road running
  • Enter online
  • Flat
  • PB
  • Fundraising optional
  • Age 18 & over
Loch Ness Marathon is a monster race - running point-to-point alongside the shores of the most famous loch in the world!
  • Sun 27 Sep
  • £80
Inverness, Highland

Loch Ness Marathon

Loch Ness Marathon is a monster race - running point-to-point alongside the shores of the most famous loch in the world!

  • 26.2 miles road running + 350 m ascent
  • Chip timing
  • Enter online
  • Undulating
  • PB
  • Traffic free
  • Age 18 & over

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