Flat Marathons in UK in March 2026
Find flat marathons in UK in March 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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Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Sat 7 Mar
- £16-£35
The Panda Plod
Here's another animal-inspired event for you. The featured animal this time is a panda! The medal, as always, is incredible and definitely one to add to your collection!
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sat 7 Mar
- £33-£35
London Marathon Long Training Run | Day 1
Build marathon confidence on a fully supported long run, choosing your distance, fuelling every lap and training smart in a relaxed, friendly environment with likeminded runners.
- 7 hrs trail running
- Sun 8 Mar
- £53-£55
Thames Meander Spring | 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
- Sat 14 Mar
- £16-£35
The Sloth Scamper
Come and join in The Sloth Scamper, slow is the new fast and you can earn yourself a medal with an adorable sloth on to boot - anyone know what a group of sloths is called?
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sat 14 Mar
- £40-£42
Spring Time Canal Canter | Marathon
Fast, flat, PB-grabbing event on traffic-free trails and the canal towpath with a bespoke medal and treats at the finish line. All levels of runner welcome.
- 26.2 miles trail running
- Sat 14 Mar
- £33-£35
London Marathon Long Training Run | Day 2
Build marathon confidence on a fully supported long run, choosing your distance, fuelling every lap and training smart in a relaxed, friendly environment with likeminded runners.
- 7 hrs trail running
- Sun 15 Mar
- £18-£38
The Dashing Dog Charity Run | Wales
Come and join the Dashing Dog Charity run in the picturesque Dare Valley Country Park. Not only is the scenery beautiful but you will earn one of these awesome medals!
- Road run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sat 21 Mar
- £16-£35
The Flying Fox
Come and join The Flying Fox event! Are you as cunning and as quick as a fox and fancy showcasing your running skills?
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sat 21 Mar
- £15-£34
The Flying Fox | Northampton
Come and join in for The Flying Fox event! Are you as cunning and as quick as a fox and fancy showcasing your running skills?
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sat 21 Mar
- £33-£35
London Marathon Long Training Run | Day 3
Build marathon confidence on a fully supported long run, choosing your distance, fuelling every lap and training smart in a relaxed, friendly environment with like-minded runners.
- 7 hrs trail running
- Sun 22 Mar
- £18-£40
The Dashing Dog Charity Run
Come and join in for Dashing Dog Charity run along the picturesque River Thames, not only is the scenery beautiful and you will earn one of the awesome medals!
- Road run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sat 28 Mar
- £23-£35
Milkshake Meander | Marathon
"My milkshake brings all the boys to the yard"... not quite sure where we're going with this but come and join this fantasic Milkshake Meander event!
- 26.2 miles multi terrain running
- Sun 29 Mar
- £40-£42
Sir Titus March Mayhem | Marathon
Spring along the Leeds and Liverpool Canal with the Spring Tide Sir Titus Trot along the flat, even towpath. Perfect for all abilities, it tends to sell out very quickly.
- 26.2 miles trail running + 276 ft ascent
- Sun 29 Mar
- £33
Brett Lydd 20 Mile
A delectable racing experience perfect for those planning a spring marathon, over a pancake flat course using the wide, quiet country lanes surrounding the marsh town of Lydd in Kent.
- 20 miles road running + 3 ft ascent
- Sun 29 Mar
- £17-£29
Fraggle Run | North | Time Challenge
Who doesn't know and love The Fraggles! Come and join in the Fraggle Run Time Challenge and earn a medal based on the adorable little creatures!
- 7 hrs 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