Flat Road runs in UK in September 2026
Find flat road runs in UK 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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MapEvent listings
Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Fri 4 Sep
- £7-£16
Rye Summer 5K Series | Race Five
Enjoy every spellbinding step through the stunning landscape of Rye Harbour Nature Reserve in this exceptional summer series. Enter one or enter more and watch your times improve.
- Fun run
- 5K run
- Sat 5 - Sun 6 Sep
- £12-£39
ATW Bedford Running Festival
More than just a running race! Join thousands at Bedfordshire’s most popular weekend of running with festival magic, live music, bar, yoga, kids zone, street food, outdoor cinema and fun fair!
- Fun run
- 5K run
- 10K run
- Half marathon
- Road run
- 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
- Fri 11 Sep
- £27-£30
AJ Bell Great North 5K
The AJ Bell Great North 5K is the curtain-raiser event for the North East’s biggest weekend of sport! It’s a fun, flat 5k dash around Newcastle and Gateshead’s vibrant Quayside.
- 5 km road running
- Sat 12 - Sun 13 Sep
- £12-£56.50
Richmond RUN-FEST
Richmond RUN-FEST consists of different distanced events, 5,000 runners, a music stage, fitness expo, amazing male and female cut tech t-shirts and chunky triangle medals!
- Fun run
- 10K run
- Half marathon
- Marathon
- Thu 17 Sep
- £25-£40
The City v Wharf Run Challenge
The challenge is back for 2026! Who will reign supreme - City or Wharf? It's time to get competitive and bring the victory to your team in the relay of the year.
- 5K run
- 10K run
- Sun 27 Sep
- £6-£80
Baxters Loch Ness Marathon and Festival of Running
Loch Ness Marathon is a monster race - running alongside the shores of the most famous loch in the world, complete with shorter distances, family and corporate events over the festival weekend.
- Marathon
- 10K run
- 5K run
- Fun run
- Sun 27 Sep
- FREE-£37
RUN Barnstaple
Go the distance for your local children's hospice with a Marathon, Half Marathon, 10K or Junior Challenge! Take on this flat and fast course and get your PB.
- Marathon
- Half marathon
- 10K run
- Fun run
- Sun 27 Sep
- £0.50
Windsor Half Marathon | Sprite Sprint
Run for fun at the Windsor Half Marathon! A short run for ages 5-9 on the grass alongside the Long Walk which you can come and enter on the day.
- 40 m road running
- Sun 27 Sep
- £49.99
Vitality London 10,000
A capital city 10K on a flat course with closed roads and world-famous landmarks! Cheering crowds, great medal, family-friendly run and wellness festival too.
- 10 km 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
- Fri 11 Sep
- £10-£12
EvenSplits York 5K Race Series - September
- 5 km road running
- Sun 20 Sep
- £3.75-£36
ABP Humber Coastal Half Marathon 10K & Family Fun Run
- 10K run
- Half marathon
- Fun run
- Sun 27 Sep
- From £38
Robin Hood Half Marathon
- 13.1 miles road running