London Marathon

Starting across the open parklands of Blackheath and Greenwich, the London Marathon traces an iconic point-to-point journey along the River Thames to the center of the capital. The route is paved on smooth tarmac and carries an overall net-downhill profile. An early drop off the Blackheath plateau around Charlton offers fast opening miles, but overeager pacing here risks taxing your quadriceps before the halfway point. Multiple starting corrals merge prior to mile three as the course works west toward the restored 19th-century clipper ship Cutty Sark, drawing massive spectator density early in the race.

From Greenwich, the course threads through Rotherhithe and Bermondsey before cresting Tower Bridge near the midway mark—the primary elevated feature on an otherwise flat profile. North of the river, runners loop through the commercial canyons of Canary Wharf and Docklands between miles 15 and 20. The tall glass towers can interfere with GPS watch tracking, so you will need to rely on the on-course mile and kilometer markers to gauge your pace. Narrow passages and sharp turns in this section can create localized wind tunnels, requiring disciplined positioning.

The final stretch traces west along Victoria Embankment, directly flanking the north bank of the Thames. While the terrain is nearly flat aside from minor underpass undulations, the physical toll of the distance peaks as you pass the Houses of Parliament and Big Ben. Turning through Birdcage Walk toward Buckingham Palace, you enter The Mall for a flat, straight sprint to the finish line.

London is accessible internationally via major hubs such as London Heathrow (LHR) and London Gatwick (LGW), as well as London City Airport (LCY) for regional arrivals. Rather than staying near the start in Blackheath or Greenwich, lodging in central London or along major transit hubs—such as London Bridge, Waterloo, or Charing Cross—is standard strategy. Southeastern rail services operate heavily on race morning to transport runners straight to Greenwich, Maze Hill, and Blackheath stations, while central locations offer effortless post-race access after finishing on The Mall.

Packet collection is mandatory prior to race day at the London Marathon Running Show, held at the ExCeL London exhibition center in the Royal Docks. You cannot collect your race bib on Sunday morning, so plan to arrive with sufficient time to navigate the DLR or Elizabeth line to ExCeL. Driving and parking are strictly discouraged due to extensive road closures along both banks of the Thames and pervasive low-emission charging zones.

Late April conditions typically offer cool, favorable marathon weather, with daytime temperatures generally hovering between 8°C and 16°C (46°F to 60°F). Rain and damp spring breezes are always possible, making discardable warmup layers essential for the wait in the open start pens at Blackheath. Sitting at sea level, the race presents no altitude challenges, leaving race-morning transit and fueling as your primary operational priorities.