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Half marathons in September 2025
Find half marathons 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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Event listings
Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Sun 28 Sep
- £35-£37
- Sun 28 Sep
- £35-£37
Welwyn Garden City, Hertfordshire, UK
ATW Welwyn Half Marathon
The popular Welwyn Half Marathon starts and finishes on the impressive 400m athletics track at Gosling Sports Park with an ideal, traffic-free, disused railway line in between.
- Chip timing
- Enter online
- Traffic free
- Age 17 & over
- 13.1 miles road running + 400 ft ascent
- Sun 28 Sep
- £30-£32
- Sun 28 Sep
- £30-£32
Barnstaple, Devon, UK
RUN Barnstaple | Half Marathon
Looking for a PB? This is your course. Pancake-flat & mostly traffic-free, come to explore the Tarka Trail then receive a fabulous medal.
- Enter online
- Flat
- Age 17 & over
- 13.1 miles road running
- Sun 28 Sep
- £24-£26
- Sun 28 Sep
- £24-£26
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
- Sat 6 Sep
Guildford, Surrey, UK
The Shere 42K, 21K & 10K Multi Terrain Event | 21K
- 21 km multi terrain running + 543 m ascent
- Sat 6 Sep
Magallanes and Chilean Antarctica, Chile
Patagonian International Marathon® | 21K
- 21 km road running + 460 m ascent
- Sun 7 Sep
Tetbury, Gloucestershire, UK
Westonbirt Arboretum Summer | Half Marathon
- 13.1 miles trail running + 175 m ascent
- Sun 7 Sep
Ebermannstadt, Germany
Franconian Switzerland Marathon | Half Marathon
- 21.1 km road running
- Sun 7 Sep
Taunton, Somerset, UK
Run the Blackdown Hills Trail 10K & Half Marathon | Half Marathon
- 22.2 km trail running + 540 m ascent
- Sun 7 Sep
Kenilworth, Warwickshire, UK
Kenilworth Half Marathon & 5K | Half Marathon
- 13.1 miles road running
- Sun 7 Sep
Richmond, UK
Richmond Park September 5K, 10K and Half Marathon | Half Marathon
- 13.1 miles multi terrain running
- Sun 7 Sep
Selby, North Yorkshire, UK
Vale of York 10K & Half Marathon | Half Marathon
- 13.1 miles road running
- Sun 28 Sep
Coleford, Gloucestershire, UK
The Forest of Dean Autumn Half Marathon
- 13.1 miles multi terrain running