6

Half marathons in West Sussex

Find half marathons in West Sussex in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

Filter by place

Filter by date

Filter by category

Map

Event listings

Select an event for photos, video, route, location, reviews, entry fees and how to enter.

Join over 1,200 runners and walkers to the Serpent Trail, a stunning route that weaves through the greensand hills, rivers, woodland, and lowland heath of the South Downs National Park.
  • Sat 18 Apr
  • FREE-£36
Midhurst, West Sussex

Spring Trail Series | 12K

Join over 1,200 runners and walkers to the Serpent Trail, a stunning route that weaves through the greensand hills, rivers, woodland, and lowland heath of the South Downs National Park.

  • 12 km trail running + 130 m ascent
  • Enter online
  • Age 18 & over
Welcome to the best running event for miles! Run rolling South Downs trails, climb rewarding hills, and take in sweeping coastal views in a scenic, spacious half. Run with heart. Run the hills.
  • Sun 3 May
  • £39
Lancing, West Sussex

Three Forts Challenge | Half Marathon

Welcome to the best running event for miles! Run rolling South Downs trails, climb rewarding hills, and take in sweeping coastal views in a scenic, spacious half. Run with heart. Run the hills.

  • 13.1 miles multi terrain running + 1455 ft ascent
  • Chip timing
  • Enter online
  • Hilly
  • Age 18 & over
Enjoy a fully closed road race, on flat coastal roads with a spectacular seafront finish. Chance to take home a PB along with the finishers' t-shirt and medal.
  • Sun 3 May
  • £40-£42
Worthing, West Sussex

Worthing RUNFEST Half Marathon

Enjoy a fully closed road race, on flat coastal roads with a spectacular seafront finish. Chance to take home a PB along with the finishers' t-shirt and medal.

  • 13.1 miles road running + 37 m ascent
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 17 & over
  • Sun 10 May
  • £40-£42
Crawley, West Sussex

Run Gatwick | Half Marathon

  • 13.1 miles road running
  • Sun 27 Sep
  • £8-£28.50
Horsham, West Sussex

Run Barns Green

  • Fun run
  • 5K run
  • 10K run
  • Half marathon

Search options

Back to search options
4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.