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
Boston Marathon
Best for
World Major bucket-list
Race B
Bank of America Chicago Marathon
Best for
Elite PB chasingNewer marathonersWorld Major bucket-list
Race A
Boston Marathon
Boston, USA
Race B
Bank of America Chicago Marathon
Chicago, USA
Date
Expected April 2027
Expected October 2027
Month
Apr
Oct
Location
🇺🇸 Boston, USA
🇺🇸 Chicago, USA
Terrain
Road
Road
Elevation gain
247 m
▲
30 m
PB potential
▲
Beginner friendly
▲
World Major
✓ Yes
✓ Yes
Entry type
Qualifier
Lottery
Entry status
Check official site
Check official site
Season
Spring · Americas
Autumn · Americas
Race-day temp.
8–16°C
10–18°C
Conditions
Variable — can be ideal or brutal
Clear to partly cloudy, cool mornings
Humidity
50–70%
50–65%
Wind
Variable 10–25 km/h
10–20 km/h variable
Qualifies for
—
Boston Marathon
Want to know how these scores are calculated? See methodology →