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Flat Half marathons in UK

Find flat half marathons in UK in 2025/2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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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.

  • Newcomers
  • Enter online
  • Flat
  • Traffic free
  • Event village
  • Coast
  • Public transport links
  • Age 18 & over
  • 7 hrs road running + 0 ft ascent
One of the longest-established and most popular city centre road events in the UK! A true Nottingham favourite, it’s also the city’s biggest charity fundraising event!
  • Sun 27 Sep 2026
  • £38-£70
  • 2 charities
Nottingham, Nottinghamshire, UK

Robin Hood Half Marathon

One of the longest-established and most popular city centre road events in the UK! A true Nottingham favourite, it’s also the city’s biggest charity fundraising event!

  • Chip timing
  • Enter online
  • Flat
  • Undulating
  • Traffic free
  • Age 17 & over
  • 13.1 miles road running
This ever popular race promises amazing coastal views and a relatively flat coastal promenade run with real PB potential.
  • Sun 27 Sep 2026
  • £25-£27
Folkestone, Kent, UK

Folkestone Rotary Half Marathon

This ever popular race promises amazing coastal views and a relatively flat coastal promenade run with real PB potential.

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Age 17 & over
  • 13.1 miles road running + 469 ft ascent
Round off your season with a flat, fast half on closed roads, roaring crowd support, and a well-earned chunky medal near Old Trafford.
  • Sun 4 Oct 2026
  • £10-£98
  • 2 charities
Manchester, Greater Manchester, UK

Manchester Half Marathon

Round off your season with a flat, fast half on closed roads, roaring crowd support, and a well-earned chunky medal near Old Trafford.

  • Trees not tees
  • Venue accessible
  • Recycling
  • Entertainment
  • Chip timing
  • Flat
  • PB
  • Traffic free
  • Fancy dress
  • Event village
  • Urban
  • Sustainability policy
  • Public transport links
  • Age 17 & over
  • 13.1 miles road running + 64 m ascent
An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage!
  • Sun 4 Oct 2026
  • £5-£60
  • 15 charities
Cardiff, South Glamorgan, UK

Oysho Cardiff Half

An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage!

  • Families
  • Carbon offset
  • Venue accessible
  • Recycling
  • Entertainment
  • Music
  • Chip timing
  • Flat
  • PB
  • Traffic free
  • Fancy dress
  • Event village
  • Urban
  • Coast
  • Sustainability policy
  • Public transport links
  • Age 17 & over
  • 13.1 miles road running + 81 m ascent
Run through four of London’s most beautiful Royal Parks, past iconic landmarks and tree-lined avenues, on a stunning autumn route that combines city energy with natural splendour.
  • Sun 11 Oct 2026
  • £25-£35
  • 4 charities
London, UK

Royal Parks Half Marathon

Run through four of London’s most beautiful Royal Parks, past iconic landmarks and tree-lined avenues, on a stunning autumn route that combines city energy with natural splendour.

  • Families
  • Trees not tees
  • Venue accessible
  • Recycling
  • Newcomers
  • Plastic bottle free
  • Entertainment
  • Music
  • Chip timing
  • GPS tracking
  • Flat
  • PB
  • Traffic free
  • Fancy dress
  • Event village
  • Urban
  • Park
  • Sustainability policy
  • Public transport links
  • Age 17 & over
  • 13.1 miles road running + 88 m ascent
Runners will enjoy the fast, flat and beautiful route through University Parks and the historic Oxford City Centre whilst celebrating running and movement with entertainment and cheering fans!
  • Sun 11 Oct 2026
  • £15-£117
  • 7 charities
Oxford, Oxfordshire, UK

Oxford Half Marathon

Runners will enjoy the fast, flat and beautiful route through University Parks and the historic Oxford City Centre whilst celebrating running and movement with entertainment and cheering fans!

  • Carbon neutral
  • Venue accessible
  • Recycling
  • Newcomers
  • Entertainment
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Fancy dress
  • Event village
  • Urban
  • Park
  • Sustainability policy
  • Public transport links
  • Age 16 & over
  • 13.1 miles road running
Don't miss out on one of the biggest half marathons in Essex; it's something special! Join runners as they go race, run, jog, and walk through Central Park and into the Essex countryside.
  • Sun 11 Oct 2026
  • £36-£54
Chelmsford, Essex, UK

Chelmsford Half Marathon

Don't miss out on one of the biggest half marathons in Essex; it's something special! Join runners as they go race, run, jog, and walk through Central Park and into the Essex countryside.

  • Chip timing
  • Enter online
  • Flat
  • Age 17 & over
  • 13.1 miles road running + 331 ft ascent
Race through historic streets and vibrant crowds, chasing your personal best on a fast, flat course and experience electrifying support and unforgettable moments in this celebrated running challenge.
  • Sun 11 Oct 2026
  • £38-£40
Peterborough, Cambridgeshire, UK

AEPG Great Eastern Run | Half Marathon

Race through historic streets and vibrant crowds, chasing your personal best on a fast, flat course and experience electrifying support and unforgettable moments in this celebrated running challenge.

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 17 & over
  • 13.1 miles road running + 65 m ascent
Sun, sea and 13.1 miles of stunning coastline — a spectacular half marathon taking you across both Bournemouth piers, as the headline event of the Run Bournemouth running festival!
  • Sun 11 Oct 2026
  • £43.25-£51.50
  • 5 charities
Bournemouth, Dorset, UK

Bournemouth Half Marathon

Sun, sea and 13.1 miles of stunning coastline — a spectacular half marathon taking you across both Bournemouth piers, as the headline event of the Run Bournemouth running festival!

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 17 & over
  • 13.1 miles road running + 101 m ascent
Take to one of the most iconic trails in the Peak District for stunning and traffic-free racing joy on a former Midland railway line taking you through four tunnels and across the spectacular viaduct!
  • Sat 24 Oct 2026
  • £36
Bakewell, Derbyshire, UK

Monsal Trail October Half Marathon | Saturday

Take to one of the most iconic trails in the Peak District for stunning and traffic-free racing joy on a former Midland railway line taking you through four tunnels and across the spectacular viaduct!

  • Enter online
  • Flat
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 1972 ft ascent
Enjoy stunning coastal views on this flexible-distance run at Milford on Sea, following an out-and-back route beside Sturt Pond and the Isle of Wight — perfect for all abilities.
  • Sun 25 Oct 2026
  • £37.50-£39.50
Lymington, Hampshire, UK

Wight Lines

Enjoy stunning coastal views on this flexible-distance run at Milford on Sea, following an out-and-back route beside Sturt Pond and the Isle of Wight — perfect for all abilities.

  • Newcomers
  • Enter online
  • Flat
  • Event village
  • Coast
  • Public transport links
  • Age 18 & over
  • 7 hrs trail running + 47 ft ascent
Take to one of the most iconic trails in the Peak District for stunning and traffic-free racing joy on a former Midland railway line taking you through four tunnels and across the spectacular viaduct!
  • Sun 25 Oct 2026
  • £36
Bakewell, Derbyshire, UK

Monsal Trail October Half Marathon | Sunday

Take to one of the most iconic trails in the Peak District for stunning and traffic-free racing joy on a former Midland railway line taking you through four tunnels and across the spectacular viaduct!

  • Enter online
  • Flat
  • Traffic free
  • Age 17 & over
  • 13.1 miles trail running + 1972 ft ascent
  • Sun 7 Dec
Chichester, West Sussex, UK

Running GP at Goodwood Motor Circuit

  • 5K run
  • 10K run
  • Half marathon 2
  • Marathon
  • 50K ultra run
  • Sun 7 Dec
Milton Keynes, Buckinghamshire, UK

Milton Keynes Winter Half Marathon

  • 13.1 miles road running + 415 ft ascent
  • Sat 20 Dec
Tiverton, Devon, UK

Christmas Canter | Half Marathon

  • 13.1 miles trail running
  • Sun 21 Dec
Southsea, Hampshire, UK

Portsmouth Coastal Waterside Marathon Events | Festive Half Marathon

  • 13.1 miles multi terrain running
  • Sun 28 Dec
Walton-on-Thames, Surrey, UK

Year End Marathon & Half Marathon | Half Marathon

  • 13.1 miles trail running
  • Sun 4 Jan 2026
Southport, Merseyside, UK

Adventure Coast Southport Half Marathon & 10K | Half Marathon

  • 13.1 miles road running + 33 ft ascent
  • Sun 11 Jan 2026
Northwich, Cheshire, UK

Montane Delamere Trail 10 & 13 | Half Marathon

  • 13.1 miles trail running + 973 ft ascent
  • Sun 1 Feb 2026
Cardiff, UK

The Cardiff 5K, 10K and Half Marathon Winter Warmer Run | Half Marathon

  • 13.1 miles road running
  • Sat 7 - Sun 8 Feb 2026
Exeter, Devon, UK

Exeter Half Marathon and Riverside 5 Miles

  • Half marathon 2
  • Fun run
  • Sat 7 Feb 2026
Newcastle upon Tyne, Tyne and Wear, UK

The Newcastle 5K, 10K and Half Marathon Winter Warmer Run | Half Marathon

  • 13.1 miles road running + 92 m ascent
  • Sat 7 Feb 2026
Dunbar, East Lothian, UK

Fox Trail Winter Running Series | Race 4 | Half Marathon

  • 13.1 miles trail running
  • Sun 8 Feb 2026
Farnborough, Hampshire, UK

Farnborough Winter Half Marathon | Half Marathon

  • 13.1 miles road running + 393 ft ascent

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