How long is a half marathon?

A half marathon is 21.0975 kilometres, or 13.1 miles — exactly half the marathon distance. Most finishers cross the line in 1:45 to 2:30.

How long does it take to train for a half marathon?

Plan on 12 to 16 weeks of training if you can already run 5K comfortably. Build to a long run of 10 to 12 miles two weeks before race day.

What's a good half marathon time?

Around 2 hours is a typical recreational goal. Sub-1:45 is a solid club time, sub-1:30 is competitive, and sub-1:15 is elite age-group level.

How much does a UK half marathon cost?

Entry fees range from around £25 for small regional events up to £60+ for major city halves like the Great North Run or Royal Parks. Most fall in the £30 to £45 bracket.

All running events in South East

Half Marathons in South East 2026

41 upcoming half marathons in South East. Browse dates, entry fees and links to enter.

Month

Upcoming half marathons in South East

41 events

Featured race

Peninsula 13.1

2026-11-15

Greenhithe, Kent

half-marathon

View details

Running Grand Prix Goodwood October

October 2026

Chichester, West Sussex

5K, 10K, Half Marathon, 20 Mile, Metric Marathon, Marathon, 50K

View details

Goodwood Motor Circuit Series 1

Recurring

11 October 2026

Chichester, West Sussex

5 km, 10 km, Half Marathon, Marathon, Ultra

View details

Hampton Court Palace Half Marathon October

October 2026

East Molesey, Surrey

Half Marathon

View details

Windsor Lakeside Marathon

18 October 2026

Windsor, Berkshire

Half Marathon, 10 km

View details

RunUK Windsor Dorney Lakeside Half Marathon

18 October 2026

Windsor, Berkshire

Half Marathon

View details

Maidstone Half Marathon

Sunday, 18 October 2026

Maidstone, Kent

Half Marathon

View details

RunThrough Richmond Park Half Marathon 2026

Recurring

18 October 2026

Richmond, Surrey

Half Marathon

View details

River Thames Half Marathon

25 October 2026

Walton-On-Thames, Surrey

Half Marathon

View details

RunThrough Maidenhead Half Marathon 2026

25 October 2026

Maidenhead, Berkshire

Half Marathon, 10 km

View details

Wendover Woods Marathon, Half Marathon & 10k

1 November 2026

Wendover, Buckinghamshire

Marathon, Half Marathon, 10 km

View details

Marlow Half Marathon, The Frankenstein and Marlow 7

1 November 2026

Marlow, Buckinghamshire

Half Marathon, 7 miles, 10 km

View details

Whitstable & Herne Bay MoRun

Saturday, 7 November 2026

Herne Bay, Kent

5K, 10K, Half Marathon

View details

GBR Run Bexhill Remembrance Run 2026

7 November 2026

Bexhill-On-Sea, East Sussex

Half Marathon, 10 km, 5 km, Fun Run

View details

Dorney Lake Half Marathon, 10K & 5K November

November 2026

Dorney, Buckinghamshire

Half Marathon, 10K, 5K

View details

Windsor Trail Run Half Marathon & 10K November

November 2026

Windsor, Berkshire

Trail Half Marathon, 10K

View details

Dorney Lake Series 2

Recurring

8 November 2026

Windsor, Berkshire

5 km, 10 km, Half Marathon

View details

RunThrough Windsor Trail Run 2026

Recurring

8 November 2026

Windsor, Berkshire

10 km, Half Marathon

View details

Gosport Half Marathon

15 November 2026

Gosport, Hampshire

Fun Run, 2 km

View details

Marden 10K & Half Marathon

Sunday, 15 November 2026

Marden, Kent

10K, Half Marathon

View details

Wimbledon Common Series 2026

Recurring

22 November 2026

Wimbledon, Surrey

10 km, Half Marathon

View details

Kingston Half Marathon & 10k 2026

22 November 2026

Kingston, Surrey

Half Marathon, 10 km

View details

Goodwood Motor Circuit Series 1

Recurring

6 December 2026

Chichester, West Sussex

5 km, 10 km, Half Marathon, Marathon, Ultra

View details

Dorney Lake Series 2

Recurring

12 December 2026

Windsor, Berkshire

5 km, 10 km, Half Marathon

View details

Dorney Lake Half Marathon, 10K & 5K December

December 2026

Eton, Buckinghamshire

5K, 10K, Half Marathon

View details

RunThrough Richmond Park Half Marathon 2026

Recurring

13 December 2026

Richmond, Surrey

Half Marathon, 10K

View details

Richmond Park HM 2027

14 February 2027

Richmond, Surrey

Half Marathon

View details

Wokingham Half Marathon 2027

21 February 2027

Wokingham, Berkshire

Half Marathon, Fun Run

View details

Paddock Wood Half Marathon

14 March 2027

Tonbridge, Kent

Half Marathon

View details

Fleet Half Marathon

14 March 2027

Fleet, Hampshire

Half Marathon

View details

Hastings Half Marathon

21 March 2027

St. Leonards-On-Sea, East Sussex

Half Marathon, Fun Run

View details

Richmond Park HM 2027

28 March 2027

Richmond, Surrey

Half Marathon

View details

Lydd Half Marathon & 20 Mile

4 April 2027

Lydd, Kent

Half Marathon

View details

White Horse Half Marathon 2027

4 April 2027

Wantage, Oxfordshire

Half Marathon

View details

Goring Gap Trails: Half Marathon 2027

23 May 2027

13.1 Miles

View details

Richmond Park HM 2027

27 June 2027

Richmond, Surrey

Half Marathon

View details

Richmond Park HM 2027

15 August 2027

Richmond, Surrey

Half Marathon

View details

Richmond Park HM 2027

19 September 2027

Richmond, Surrey

Half Marathon

View details

Richmond Park HM 2027

31 October 2027

Richmond, Surrey

Half Marathon

View details

Richmond Park HM 2027

14 November 2027

Richmond, Surrey

Half Marathon

View details

Richmond Park HM 2027

12 December 2027

Richmond, Surrey

Half Marathon

View details

Other distances in South East

Browse races by distance across South East.

5K in South East(27)10K in South East(54)Marathon in South East(9)Trail in South East(67)Ultra in South East(16)

Half Marathons in other UK regions

Find half marathons elsewhere in the UK.

London South West East of England East Midlands West Midlands Yorkshire North West North East Scotland Wales Northern Ireland

Find a parkrun in South East →

Half Marathons in South East 2026

Upcoming half marathons in South East

Other distances in South East

Half Marathons in other UK regions

Frequently asked questions

How long is a half marathon?

How long does it take to train for a half marathon?

What's a good half marathon time?

How much does a UK half marathon cost?