Choosing between Boston Marathon and London Marathon? This page puts the essentials side by side — next race date, elevation, typical weather, field size, and entry difficulty — with a short overview of each course below.
The headline differences between both races. Follow each marathon link for the full route map, elevation chart, and entry details.
| Detail | Boston Marathon | London Marathon |
|---|---|---|
| Next race | Monday, 19 April 2027 at 10:00 am | Sunday, 25 April 2027 at 9:30 am |
| Elevation | Net downhill with famous Newton hills - approx. 50m above sea level. ↑ 248 m · ↓ 388 m · net −140 m | Flat with minor bridges - approx. 25m above sea level. ↑ 127 m · ↓ 161 m · net −34 m |
| Typical weather | Cool to mild; often windy | Cool to mild spring conditions |
| Typical participants | Approximately 26k finishers | Approximately 57k finishers |
| Entry difficulty | Very competitive | Very competitive |
The Boston Marathon is the world's oldest annual marathon and the only major requiring qualification for most runners. Starting in Hopkinton and finishing on Boylston Street, the course features the challenging Heartbreak Hill and legendary New England crowd support. It is the pinnacle race for competitive amateur marathoners.
The TCS London Marathon is one of the world's most popular races, famous for its incredible charity fundraising and electric atmosphere. The fast course passes Tower Bridge, the Cutty Sark, Canary Wharf, and finishes on The Mall in front of Buckingham Palace. With gentle undulations and around 127 metres of total climbing, it consistently produces fast times — including Sabastian Sawe's 1:59:30 men's world record and Tigst Assefa's 2:15:41 women's-only world record, both set at the 2026 race.
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