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Flat 5K runs in UK in March 2026

Find flat 5k runs 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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Join this fantastic experience on a completely flat course – perfect for achieving your personal best over a certified, accurate route, with free race photo, custom medal and friendly support!
  • Sun 8 Mar 2026
  • £20-£22
Nottingham, Nottinghamshire, UK

ATW Nottingham Holme Run | 5K

Join this fantastic experience on a completely flat course – perfect for achieving your personal best over a certified, accurate route, with free race photo, custom medal and friendly support!

  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 11 & over
  • 5 km road running + 7 ft ascent
Ready... Steady... GLOW! Expect to be swept away on a distinctly magical 5K experience as dusk falls on the home of two 30-metre high horses.
  • Fri 13 - Sat 14 Mar 2026
  • £26
Grangemouth, Falkirk, UK

Supernova Run Kelpies 5K

Ready... Steady... GLOW! Expect to be swept away on a distinctly magical 5K experience as dusk falls on the home of two 30-metre high horses.

  • Families
  • Venue accessible
  • Recycling
  • Beginner-friendly
  • Fancy dress
  • Urban
  • Free venue entry
  • Sustainability policy
  • Public transport links
  • All ages
  • 5K run 2
This disused airfield has a fast, flat, tarmac course with no sharp corners, and the surrounding tree cover makes for relatively still conditions on most days - but your PB or run stress-free.
  • Sun 15 Mar 2026
  • £16-£18
Saffron Walden, Essex, UK

ATW Debden 5K

This disused airfield has a fast, flat, tarmac course with no sharp corners, and the surrounding tree cover makes for relatively still conditions on most days - but your PB or run stress-free.

  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 11 & over
  • 5 km road running + 46 ft ascent
Kickstart your season with the Flapjack 5K — a friendly, fast, and flat run on Torbay Velopark’s smooth tarmac, with a delicious flapjack reward at the finish!
  • Sun 15 Mar 2026
  • £10-£18
Paignton, Devon, UK

Flapjack 5K

Kickstart your season with the Flapjack 5K — a friendly, fast, and flat run on Torbay Velopark’s smooth tarmac, with a delicious flapjack reward at the finish!

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 11 & over
  • 5 km road running
  • Sun 1 Mar 2026
Cardiff, UK

St Davids Day Run | 5K

  • 5 km road running
  • Sun 15 Mar 2026
Milton Keynes, Buckinghamshire, UK

Milton Keynes Festival of Running | 5K

  • 5 km road running
  • Sun 15 Mar 2026
Birchington, Kent, UK

Smugglers Run 10K & 5K | 5K

  • 5 km road running
  • Sun 22 Mar 2026
Herne Bay, Kent, UK

Run Whitstable & Herne Bay Spring 5K, 10K and Half Marathon | 5K

  • 5 km road running

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