Why London produces so many personal bests
Strip out London's elevation profile and the course is close to a straight line along the river, through Greenwich, Tower Bridge, Canary Wharf, and the Tower of London, before finishing past Buckingham Palace on The Mall. There is no equivalent of Boston's Newton Hills or New York's five bridges. Runners lose almost nothing to terrain, which is the main reason London sits alongside Berlin and Chicago as one of the three majors most associated with fast times and record attempts.
What London adds on top of the flat course is crowd density. The route runs through some of the most densely populated stretches of any major, and the noise is constant from start to finish. That is a double-edged advantage: it can carry a runner through a hard patch, but it can also pull an underprepared runner into a pace they cannot hold.
Famous winners and defining moments
London's first race in 1981 ended with an image the race is still known for: Dick Beardsley and Inge Simonsen crossing the finish line holding hands, refusing to race each other for the win and finishing in an identical 2:11:48. In 2003, Paula Radcliffe ran 2:15:25 on this course, an outright world record that stood for sixteen years before Brigid Kosgei broke it in Chicago in 2019. It remains the London course record in mixed-sex competition.
The race reached a new landmark in April 2026, when Sabastian Sawe ran 1:59:30, the first marathon completed under two hours in conditions eligible for a world record, with runner-up Yomif Kejelcha also breaking the barrier. In the same edition, Tigst Assefa ran 2:15:41 in the women-only category, an elite women's start with no male pacers. Both results place the 2026 London Marathon among the most significant single days in the sport's history.
Alongside the elite race, London's charity fundraising has grown into its own kind of record. More than 1.4 billion pounds raised since 1981, with the 2025 edition alone bringing in over 87 million pounds, the largest total ever raised at a single-day charity event anywhere in the world.
How to train for London
A flat, fast course rewards a specific kind of preparation. It punishes runners who show up strong but undisciplined just as readily as it rewards a well-executed plan.
Build marathon-pace endurance, not hill strength
Without hills or a meaningful downhill to manage, the biggest lever on a London result is the ability to hold goal pace for the full distance. Prioritize marathon-pace tempo runs and long runs with a fast finish over hill-specific strength work, which matters far less here than on a course like Boston or Sydney.
Rehearse pacing discipline under noise
London's crowds are loud from the first mile. Practice holding a planned pace in a busy local race or a group run with people pushing the tempo, so the adrenaline of race day pulls you toward your plan instead of away from it.
Train for a negative split, not a fast start
The flat profile makes an aggressive first half feel deceptively easy. Build long runs that finish faster than they start, so your legs and your pacing instincts are conditioned to hold back early and press in the final ten kilometers, where London is actually won or lost.
As with every major, the course-specific work sits on top of a real base, not instead of one. Start with the long run and a properly built aerobic base before layering in London-specific pacing work.
