London · Sun, April 25, 2027 · 09:30
Projected at race day for M 18-34, from your 4:00:00 marathon + training runway.
Registration / lottery closes Sun, May 3, 2026
World Major. Lottery ~4%. Flat. International travel from Miami.
The TCS London Marathon is a marathon held in London on April 25, 2027. With a Green Score of 7.4/10, it's a moderate race. The course is pancake-flat (~9 ft of gain per mile). Typical race-day weather is a cool 48°F, dew point ~40°F (10-year normal). It is a Boston-qualifying course. Entry is around $175. Marathon Compass rates every race across terrain, climate, logistics, travel, and field size so you can find the one that fits you — and build a training plan tuned to your fitness.