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Marathons with PB potential in UK in March 2026

Find marathons with pb potential in UK in March 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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Fast, flat, PB-grabbing event on traffic-free trails and the canal towpath with a bespoke medal and treats at the finish line. All levels of runner welcome.
  • Sat 14 Mar
  • £40-£42
Leeds, West Yorkshire, UK

Spring Time Canal Canter | Marathon

Fast, flat, PB-grabbing event on traffic-free trails and the canal towpath with a bespoke medal and treats at the finish line. All levels of runner welcome.

  • 26.2 miles trail running
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 18 & over
A delectable racing experience perfect for those planning a spring marathon, over a pancake flat course using the wide, quiet country lanes surrounding the marsh town of Lydd in Kent.
  • Sun 29 Mar
  • £33
Romney Marsh, Kent, UK

Brett Lydd 20 Mile

A delectable racing experience perfect for those planning a spring marathon, over a pancake flat course using the wide, quiet country lanes surrounding the marsh town of Lydd in Kent.

  • 20 miles road running + 3 ft ascent
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Age 18 & over
  • Sun 8 Mar
Burry Port, Dyfed, UK

Great Welsh Marathon Events | Full Marathon

  • 26.2 miles road running + 363 ft ascent

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