Flat and fast UK marathons
15 coming up. Marathons whose courses are known for being flat, fast or PB-friendly, on road and path.
November 2026
1 race
April 2027
6 races
Sold outBrighton Marathon
Running · Brighton, East Sussex
Marathon · 10K
Bath & Bristol Railway Races
Running · Bath, Somerset
Marathon · Half Marathon · 10K
ABP Newport Marathon Festival
Running · Newport
Marathon · Half Marathon · 10K
Sold outManchester Marathon
Running · Manchester, Greater Manchester
Marathon
Blackpool Festival of Running
Running · Blackpool, Lancashire
Marathon · Half Marathon
TCS London Marathon
Running · London, Greater London
Marathon
May 2027
2 races
June 2027
1 race
August 2027
1 race
October 2027
4 races
Bournemouth Marathon Festival
Running · Bournemouth, Dorset
Marathon · Half Marathon · 10K
Abingdon Marathon
Running · Abingdon, Oxfordshire
Marathon
Great Welsh Marathon
Running · Llanelli, Carmarthenshire
Marathon · Half Marathon
Yorkshire Marathon
Running · York, North Yorkshire
Marathon · 10 Miles
Nothing matches those filters. Try a wider area or another month.
What makes a marathon fast?
Three things matter most: how much you climb, how many tight turns you take, and how cool race day is. A flat course lets you hold an even pace, and a big field gives you people to run with for the full 26.2 miles. Spring and autumn races tend to have the cooler conditions that suit a PB.
We include a race here when the course is described as flat or fast. Check the organiser's course profile before you commit: some have a short climb or an exposed section. Set your splits with the running pace calculator.
Which UK marathon is the flattest?
Does a flat course always mean a faster time?
Organising a race?
Listing is free and goes live within a few days. Want more entrants? Featured listings put your race at the top of its category and region.