Runs in South East in September 2025
Find runs near me in South East in September 2025 - search by date or place, display on a map or use the advanced search to find your perfect race.
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Click an event for full event details, location, route, sustainability, what's included and how to enter.

- Sat 27 Sep
- £139
- 12 charities
- Sat 27 Sep
- £139
- 12 charities
Chiltern 50 Ultra Challenge | Full 50km
The full 50K route of the Chiltern 50 Ultra Challenge starts from basecamp in Henley on a loop via Greys Court, the Ridgeway, Shakespeare's Way, The Chilterns and Hambleden Village to a party finish!
- Chip timing
- Enter online
- GPS tracking
- Undulating
- Age 18 & over
- 50 km trail running + 920 m ascent

- Sat 27 Sep
- £89
- 12 charities
- Sat 27 Sep
- £89
- 12 charities
Chiltern 50 Ultra Challenge | Henley 25km Loop
An exciting 25km loop as part of the Chiltern 50 Ultra Challenge from Henley Showground past the River Thames, Greys Court and the pretty Hambleden Village to a celebratory finish!
- Enter online
- GPS tracking
- Undulating
- Age 14 & over
- 25 km trail running + 500 m ascent

- Sat 27 Sep
- £75
- Sat 27 Sep
- £75
Fortitude Ultra | Denbies
10Hrs: 10 Laps: You-vs-You. Complete 10 laps of the ~3-mile, 4-mile or 5-mile loops in the given time through the scenic Denbies Wine Estate.
- Newcomers
- Enter online
- Hilly
- Traffic free
- Event village
- Rural
- Free venue entry
- Sustainability policy
- Age 20 & over
- 10 hrs trail running

- Sat 27 Sep
- £39
- 13 charities
- Sat 27 Sep
- £39
- 13 charities
The Chiltern 10K
A beautiful 10km loop from the basecamp at Henley Showground exploring public footpaths and wonderful woodlands within the Culden Faw estate to be rewarded with a medal and glass of fizz!
- Enter online
- Undulating
- Age 15 & over
- 10 km trail running + 235 m ascent

- Sun 28 Sep
- £65-£80
- Sun 28 Sep
- £65-£80
Hever Castle | Marathon
Get active in the award-winning grounds and surrounding Kent countryside in a full marathon! Recruit your friends and celebrate completing your challenge in the festival village.
- Chip timing
- Enter online
- Relay
- Age 18 & over
- 42.2 km trail running

- Sun 28 Sep
- £45
- Sun 28 Sep
- £45
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

- Sun 28 Sep
- £35
- Sun 28 Sep
- £35
Hever Castle | 10K
Get active in the award-winning grounds and surrounding Kent countryside in a 10K run! Recruit your friends to join in then celebrate completing your challenge in the festival village.
- Chip timing
- Enter online
- Age 15 & over
- 10 km trail running

- Sun 28 Sep
- £4
- Sun 28 Sep
- £4
Folkestone Rotary Half Marathon | Junior Race
This ever popular race promises amazing coastal views and a relatively flat coastal promenade run with real PB potential.
- Enter online
- All ages
- 1 km road running

- Sun 28 Sep
- £24-£26
- Sun 28 Sep
- £24-£26
Folkestone Rotary Half Marathon | 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
- Sat 6 Sep
The Shere 42K, 21K & 10K Multi Terrain Event | 42K
- 42 km multi terrain running + 1300 m ascent
- Sat 6 Sep
The Shere 42K, 21K & 10K Multi Terrain Event | 21K
- 21 km multi terrain running + 543 m ascent
- Sat 6 Sep
The Shere 42K, 21K & 10K Multi Terrain Event | 10K
- 10 km multi terrain running + 217 m ascent
- Sun 7 Sep
Bradenham Blast | 10K
- 10 km trail running + 239 m ascent
- Sat 20 Sep
Tough Mudder London South | Kids by Spartan 3K - Saturday
- 3 km multi terrain running
- Sat 20 Sep
Tough Mudder London South | Kids by Spartan 1.5K - Saturday
- 1.5 km multi terrain running
- Sat 20 Sep
The Hard Yard 10 Mile Trail Race
- 10 miles trail running + 877 ft ascent
- Sat 20 Sep
Tough Mudder London South | Kids by Spartan 1K - Saturday
- 1 km multi terrain running