Flat Marathons in UK
Find flat marathons in UK in 2026/2027 - 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 22 Aug
- £40-£42
Summer Extravaganza | Marathon
Soak up summer miles on a flat, fast canal towpath, with great support, generous treats and distances for every runner including marathon — a Yorkshire day out to remember.
- 26.2 miles trail running + 288 ft ascent
- Sun 30 Aug
- £16-£29
GNR & Time Turner | Durham
Whether you're looking to get some miles under your belt before The Great North Run or you just fancy a run along the beautiful River Wear, then this is the event for you!
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sat 5 Sep
- £40-£42
Hip Hip Hooray it's Hornsea | Marathon
We all love to be beside the seaside, so why not enjoy a trail marathon from the coast at Hornsea? You can grab yourself fish and chips and an ice cream from the front after the race.
- 26.2 miles trail running + 322 ft ascent
- Sun 13 Sep
- £49.50-£56.50
Richmond Marathon
Run 'The world's most scenic marathon' through London's greenest borough including Richmond Bridge and the Tow Path. Start inside the Kew Gardens with family fun music festival to finish!
- 26.2 miles road running + 160 m ascent
- Sat 19 Sep
- £39-£41
Oktoberfest | Marathon
Get your Oompah vibe on and enjoy a trip up the Leeds and Liverpool Canal. A marathon to warm the depths of your heart along the flat, even towpath - this event is perfect for all abilities.
- 26.2 miles trail running + 210 ft ascent
- 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 4 Oct
- £53-£55
Thames Meander Autumn | Marathon
Previously rated one of the top 10 UK marathons by Runners World! Stunningly scenic riverside routes along the Thames towpath. Flat, fast and very runnable with great runner support.
- 26.2 miles trail running + 600 ft ascent
- Sun 25 Oct
- £37.50-£39.50
Wight Lines
Enjoy stunning coastal views on this flexible-distance run at Milford on Sea, following an out-and-back route beside Sturt Pond and the Isle of Wight — perfect for all abilities.
- 7 hrs trail running + 47 ft ascent
- Sat 31 Oct
- £39-£41
Hubble Bubble & Ghostly 1 Mile | Marathon
A Halloween-themed marathon you won't want to miss, bringing together runners of all abilities to share memories in what they love to do. Reach the finish to enjoy tasty Halloween treats.
- 26.2 miles trail running + 288 ft ascent
- Sun 8 Nov
- £25-£37
Remembrance Day Run | South | Marathon
Your chance to remember those who have given the ultimate sacrifice during conflicts around the world, with a two-minute silence, a marathon, then a Remembrance medal, a goody bag and a special pin.
- 26.2 miles trail running
- Sun 6 Dec
- £22-£34
The Snow Globe Gallop Bobble Hat Run | North | Marathon
Come and join in the Snow Globe Gallop, get a few miles under your belt before the Christmas festivities really kick in plus you will get a bobble hat for all your effort!
- 26.2 miles trail running
- Sat 26 Dec
- £33-£35
Boxing Day Challenge | Marathon
Come and join the day of running and aim to complete a marathon at your own pace on a flat, out-and-back route along the River Thames then receive a bespoke medal and goody bag at the finish!
- 26.2 miles trail running
- Sun 8 Mar
- £50
Great Welsh Marathon Events | Full Marathon
- 26.2 miles road running + 363 ft ascent
- Sun 15 Mar
- £22-£25
Cambridge Boundary Run | Marathon
- 26.2 miles trail running
- Sun 22 Mar
- £42-£44
Grand Canal Canter | Marathon
- 26.2 miles trail running + 180 ft ascent
- Sun 26 Apr
- £42
Shakespeare Marathon & Half Marathon | Full Marathon
- 26.2 miles road running + 188 m ascent
- Sun 6 Sep
- £43-£45
City to Sea | Marathon
- 26.2 miles trail running + 2400 ft ascent
- Sun 13 Sep
- £66-£68
The Garmin New Forest Marathon | Full Marathon
- 26.2 miles multi terrain running + 160 ft ascent