25. Three Castles Land Marathon

The London Marathon, one of the most prestigious marathon events worldwide, will hold its 46th edition on Sunday, April 26, 2026, in London. More than 55,000 finishers are expected, making this event one of the largest marathons in the world – a strong SEO-relevant argument. Since its inception, the London Marathon has established itself as a platform for elite sports, charity, and a broad audience. The weather during last year's edition was typical for London in spring – mostly cool, occasionally slightly windy, but ideal for marathon performances. Information on entry fees has not yet been officially released; however, a lottery or chance-based registration is often required to secure a starting place. The course is nearly flat, with minimal elevation differences, making it particularly performance-friendly.

• SEO-relevant keywords: London Marathon 2026, London Marathon number of participants, Marathon London April 2026, London Marathon history.
• History: First held in 1981, the London Marathon has taken place annually since then and has developed into one of the World Marathon Majors.
• Weather in the previous year: In April 2025, the weather in London was predominantly cool with temperatures around 10 °C, with occasional light drizzle, which provided ideal conditions for marathon runners (typical spring climate in London).
• Registration mode: Traditionally limited, often accessible via lottery ("Ballot") – no official details for 2026 yet available.
• Elevation: The course is largely flat, with only marginal elevation differences, making it particularly fast and accessible.

Marathon (42,195 km)