Flat Half marathons in September 2026
Find flat half marathons near me in September 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sat 5 Sep
- £30-£32
Hip Hip Hooray it's Hornsea | Half Marathon
We all love to be beside the seaside, so why not enjoy a trail half marathon from the coast at Hornsea? You can grab yourself fish and chips and an ice cream from the front after the race.
- 13.1 miles trail running + 161 ft ascent
- Sun 6 Sep
- £15-£35
The Big Half
Celebrate London’s diversity at The Big Half - a vibrant, inclusive half marathon through four iconic boroughs, where community spirit, culture and cheering crowds power every mile.
- 13.1 miles road running + 218 ft ascent
- Sun 6 Sep
- £42-£44
Bedford Half Marathon
13.1 miles of traffic free, stunning Bedfordshire countryside followed by a festival village with live music, street food, yoga, entertainment and more at the unforgettable post-race party.
- 13.1 miles road running + 59 ft ascent
- Sun 13 Sep
- £43-£50
Richmond Half Marathon
Be part of London's most exclusive event! Run through its greenest borough, exploring the beauties and history of Richmond. Start inside the Kew Gardens with a family music festival to finish!
- 13.1 miles road running + 91 ft ascent
- Sat 19 Sep
- £30-£32
Oktoberfest | Half Marathon
Get your Oompah vibe on and enjoy a trip up the Leeds and Liverpool Canal. A half marathon to warm the depths of your heart along the flat, even towpath - this event is perfect for all abilities.
- 13.1 miles trail running + 105 ft ascent
- Sun 20 Sep
- £35-£36
Yabba Dabba Doo | Half Marathon
It's time to have some fun! This multi-lap event is great for increasing distance, and runners will complete a half marathon around the beautiful reservoir for their Yabba Dabba Doo medal!
- 13.1 miles multi terrain running
- Sun 27 Sep
- £37.50-£39.50
SoBo Series | Volume 4 | Stop me (if you think you've heard this one before)
Set along the beachfront promenade at Southbourne (SoBo), choose your own distance from 5K to ultra, along this flat, tarmacked, lapped route suitable for all abilities.
- 7 hrs road running
- Sun 27 Sep
- £30-£32
RUN Barnstaple | Half Marathon
Looking for a PB? This is your course. Pancake-flat and mostly traffic-free, come to explore the Tarka Trail then receive a fabulous medal.
- 13.1 miles road running
- Sun 27 Sep
- From £25
Folkestone Rotary Half Marathon
This ever popular race promises amazing coastal views and a relatively flat coastal promenade run with real PB potential.
- 13.1 miles road running + 469 ft ascent
- Sun 6 Sep
- £35-£37
City to Sea | Half Marathon
- 13.1 miles trail running + 2100 ft ascent
- Sun 13 Sep
- £51-£53
New Forest Marathon | Half Marathon
- 13.1 miles multi terrain running + 150 ft ascent
- Sun 20 Sep
- £27-£36
ABP Humber Coastal Half Marathon 10K & Family Fun Run | Half Marathon
- 13.1 miles multi terrain running + 187 ft ascent