London Marathon Training Plan: Spring Weather, Net Downhill, and the Crowd of a Lifetime

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The London Marathon is one of the most beloved marathons in the world. About 50,000 finishers each year. Crowds described by Eliud Kipchoge as "the best in the world." Television coverage that takes the race into hundreds of millions of homes. The course is fast — about 100 feet of net downhill from start to finish — and the April weather, when it cooperates, is close to ideal for racing.

This article covers training modifications for the London course. For the broader marathon picture, see the marathon training plan guide.

The London Course Profile

London is a fast course but not a flat one. Three things matter:

• Net downhill. The course drops about 100 feet from Greenwich (start) to The Mall (finish). Less dramatic than Boston's downhill but still favorable.
• Bunched corrals. 50,000 finishers means crowded starts. The first 5K is usually slow with no choice in the matter.
• Mile 13 climb at Tower Bridge. A noticeable but manageable rise on Tower Bridge. Plan for slight pace slowdown.

Total elevation change is small. London is closer to Berlin (fast) than Boston (hard) on the spectrum.

Training Modifications for London

1. Standard Marathon Plan With Pace Discipline

London doesn't require dramatic course-specific modifications like Boston or NYC. A solid generic marathon plan works well — the modifications come from race-day strategy more than from training tweaks.

The one training emphasis worth considering: practice early-race patience. The bunched London corrals make fast first miles impossible, so train to feel comfortable holding back. Long runs that start very slow (slower than usual) and progress to marathon pace late teach this discipline.

2. April Weather Range Training

April in London averages 50-55°F at race start, but the range is huge — recent races have ranged from 35°F to 75°F. Train for the range:

• Late-winter long runs (cold) prepare for cold race years
• Early-spring long runs (warming up) prepare for warm race years
• Have race-day clothing options for both extremes
• Use a heat pace adjustment if forecasts show 65°F+

3. Mental Rehearsal for Crowd Energy

London's crowds are unique. They're loud, deep, and continuous from start to finish. Most runners get pulled to faster early splits than they planned just from the energy. The mental rehearsal: visualize ignoring the crowd's pacing pressure for the first 10 miles. Lock into your goal pace regardless of what the crowd is doing.

Pacing London on Race Day

London's bunched start makes the first 1-2 miles essentially uncontrolled. Plan for this:

• First 1-2 miles: Goal pace + 30-60 seconds. Don't fight it. The crowd will sort out by mile 3.
• Miles 3-13 (across the Thames, Tower Bridge): Lock into goal pace. Mile 13 includes Tower Bridge — expect 10-15 seconds slower for that mile.
• Miles 14-22 (Canary Wharf and back): Crowds peak. Resist surging.
• Miles 23-26.2 (Embankment to The Mall): The legendary final stretch. If you've paced well, you have legs to push.

Common London Mistakes

Going out too fast after the corral opens up. Once you're past the bunched start (mile 2-3), the course feels fast. Runners overcorrect and run miles 3-5 at faster than goal pace, blowing the second half.

Underestimating Tower Bridge. The mile-13 climb is short but noticeable. Plan for 10-15 seconds slower for that mile and don't try to make it back immediately.

Getting pulled by crowd energy. London's crowds are intoxicating. Lock into your watch, not the cheers.