Flat Marathons in UK
Find flat marathons in UK in 2025/2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
Filter by date
This week
This weekend
Next week
Next weekend
Dec
Jan
Feb
Mar
Apr
May
Jun
Aug
Sep
Oct
Nov
Winter
Spring
Summer
Autumn
Filter by place
London
South East
South West
East of England
East Midlands
West Midlands
Yorkshire
North West
Scotland
Wales
Everywhere
Filter by category
MapEvent listings
Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Sat 5 Sep 2026
- £39-£41
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.
- Chip timing
- Enter online
- Flat
- Age 18 & over
- 26.2 miles trail running + 322 ft ascent
- Sun 13 Sep 2026
- £49.50-£56.50
- 5 charities
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!
- Chip timing
- Enter online
- Flat
- PB
- Traffic free
- Age 18 & over
- 26.2 miles road running + 160 m ascent
- Sat 19 Sep 2026
- £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.
- Chip timing
- Enter online
- Flat
- PB
- Age 18 & over
- 26.2 miles trail running + 210 ft ascent
- Sun 27 Sep 2026
- £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.
- Beginner-friendly
- Enter online
- Flat
- Traffic free
- Event village
- Coast
- Public transport links
- Age 18 & over
- 7 hrs road running + 0 ft ascent
- Sun 4 Oct 2026
- £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.
- Chip timing
- Enter online
- Flat
- Age 18 & over
- 26.2 miles trail running + 600 ft ascent
- Sun 25 Oct 2026
- £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.
- Beginner-friendly
- Enter online
- Flat
- Event village
- Coast
- Public transport links
- Age 18 & over
- 7 hrs trail running + 47 ft ascent
- Sat 31 Oct 2026
- £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.
- Enter online
- Flat
- PB
- Traffic free
- Age 18 & over
- 26.2 miles trail running + 288 ft ascent
- Sun 8 Nov 2026
- £26-£38
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.
- Enter online
- Flat
- Age 18 & over
- 26.2 miles trail running + 0 ft ascent
- Sun 21 Dec
Portsmouth Coastal Waterside Marathon Events | Portsmouth Coastal Waterside Marathon
- 26.2 miles multi terrain running
- Sun 28 Dec
Year End Marathon & Half Marathon | Marathon
- 26.2 miles trail running
- Sun 8 Mar 2026
Great Welsh Marathon Events | Full Marathon
- 26.2 miles road running + 363 ft ascent
- Sun 22 Mar 2026
Grand Canal Canter | Marathon
- 26.2 miles trail running + 180 ft ascent
- Sun 26 Apr 2026
Shakespeare Marathon & Half Marathon | Full Marathon
- 26.2 miles road running + 188 m ascent
- Sun 13 Sep 2026
The Garmin New Forest Marathon | Full Marathon
- 26.2 miles multi terrain running + 160 ft ascent