Free tool
Compare marathons
Side-by-side comparison of elevation, PB potential, beginner friendliness, terrain, weather, and entry details. Pick two races and see how they stack up.
Race A
vs
Race B
Race A
Belfast City Marathon
Best for
Newer marathonersQualifying pathway
Race B
TCS London Marathon
Best for
Strong PB attemptsNewer marathonersWorld Major bucket-list
Race A
Belfast City Marathon
Belfast, United Kingdom
Race B
TCS London Marathon
London, United Kingdom
Date
Expected May 2027
Expected April 2027
Month
May
Apr
Location
🇬🇧 Belfast, United Kingdom
🇬🇧 London, United Kingdom
Terrain
Road
Road
Elevation gain
175 m
▲
84 m
PB potential
▲
Beginner friendly
World Major
No
✓ Yes
Entry type
Open
Lottery
Entry status
Check official site
Check official site
Season
Spring · Europe
Spring · Europe
Race-day temp.
8–17°C
9–15°C
Conditions
Northern Irish May — mild and often breezy, possible showers
Cool and overcast, occasional light rain
Humidity
60–75%
60–70%
Wind
10–25 km/h
10–20 km/h SW
Qualifies for
Boston Marathon
—
Want to know how these scores are calculated? See methodology →