Half marathons in South East in September 2025

Find half marathons near me in South East in September 2025 - filter by date or location, display on a map or use the advanced search to find your perfect race.

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Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course was previously rated one of the top UK marathons.

Sat 13 Sep
£43-£45

Sat 13 Sep
£43-£45

Wadhurst, East Sussex, UK

Bewl Water Autumn | Half Marathon

Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course was previously rated one of the top UK marathons.

Chip timing
Enter online
Undulating
Age 17-80

13.1 miles trail running + 710 ft ascent

Who doesn't know and love The Fraggles! Come and join Saturn Running for the Fraggle Run and earn a medal based on the adorable little creatures!!

Sun 21 Sep
£23-£35

Sun 21 Sep
£23-£35

Staines, Surrey, UK

Fraggle Run | Half Marathon

Who doesn't know and love The Fraggles! Come and join Saturn Running for the Fraggle Run and earn a medal based on the adorable little creatures!!

Enter online
Age 17 & over

13.1 miles road running + 0 ft ascent

Anyone know what a group of otters is called?? A romp!!! So Saturn Running is holding an event inspired by these adorable little creatures and the medal is super cute too!

Sat 27 Sep
£23-£35

Sat 27 Sep
£23-£35

Staines, Surrey, UK

Romp Run | Half Marathon

Anyone know what a group of otters is called?? A romp!!! So Saturn Running is holding an event inspired by these adorable little creatures and the medal is super cute too!

Enter online
Age 17 & over

13.1 miles road running + 0 ft ascent

Get active in the award-winning grounds and surrounding Kent countryside in a half marathon! Recruit your friends and celebrate completing your challenge in the festival village.

Sun 28 Sep
£45

Sun 28 Sep
£45

Edenbridge, Kent, UK

Hever Castle | Half Marathon

Get active in the award-winning grounds and surrounding Kent countryside in a half marathon! Recruit your friends and celebrate completing your challenge in the festival village.

Chip timing
Enter online
Age 17 & over

21.1 km trail running

An inspiring half marathon in Windsor Great Park, starting and finishing on the Long Walk with Windsor Castle as the backdrop - probably the most iconic of all road race finishes in the UK!

Sun 28 Sep
£42-£44

Sun 28 Sep
£42-£44

Windsor, Berkshire, UK

Windsor Half Marathon

An inspiring half marathon in Windsor Great Park, starting and finishing on the Long Walk with Windsor Castle as the backdrop - probably the most iconic of all road race finishes in the UK!