London splits its 2027 marathon across April 24 and 25, with each runner assigned one day. That allocation is fixed, so check it before booking the trip. The ballot is closed; charity and other official entry paths have separate requirements. Saturday has a 17:30 finish closure. The Thames-side course is the draw, but arriving for the wrong day would undo the entire weekend.
Better info coming — we're still verifying 2 fields on this race.
Major race decision brief
Know the catch before you book the flight.
Four facts shape this weekend: entry, course load, the start-to-finish problem, and whether your crew gets a good trip too.
01 · Secure the bib
Closed · Lottery
The ballot is closed. The 2027 race spans April 24–25; this listing uses April 24. Your allocated day is fixed. Saturday finish closes at 17:30. Confirm your entry-route fee directly; no current USD conversion is asserted. Treat travel as refundable until your place and any qualification requirement are confirmed.
02 · Read the load
125 m climbing
Flat and fast along the Thames, from Greenwich to The Mall past the Cutty Sark, over Tower Bridge near halfway, and through the Canary Wharf canyons before the flag-lined finish by Buckingham Palace. Around 125 meters of total gain, much of it the early downhill out of Blackheath; the course nets downhill and runs that way. The crowds are loud the whole route, but the opening miles bottleneck hard with the pack packed onto narrow southeast-London streets.
03 · Solve the base
Point-to-point logistics
Start and finish sit roughly 10 km apart as the crow flies. Choose a base around the official transport plan or finish—not from a map pin that only looks close to the start.
04 · Pack the range
7–15°C
Historical rain signal: 25%. Use reviewed climate data for packing, then switch to the live forecast inside race week.
Crew fit is 5/5. Use the spectator guide to decide whether this is a shared city weekend or a runner-first operation.
Why we'd pick it
- The 125 m climbing estimate is useful for planning, not a verified pacing number.
- The ballot is closed for this edition.
- A non-racing partner gets a real weekend here — 5/5.
- Race day usually sits 7–15°C, about 25% chance of rain.
The course
Flat and fast along the Thames, from Greenwich to The Mall past the Cutty Sark, over Tower Bridge near halfway, and through the Canary Wharf canyons before the flag-lined finish by Buckingham Palace. Around 125 meters of total gain, much of it the early downhill out of Blackheath; the course nets downhill and runs that way. The crowds are loud the whole route, but the opening miles bottleneck hard with the pack packed onto narrow southeast-London streets.
