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
Bank of America Chicago Marathon
Best for
Elite PB chasingNewer marathonersWorld Major bucket-list
Race B
NN Rotterdam Marathon
Best for
Elite PB chasingFirst marathonsFlat-course PBs
Race A
Bank of America Chicago Marathon
Chicago, USA
Race B
NN Rotterdam Marathon
Rotterdam, Netherlands
Date
Expected October 2027
Expected April 2027
Month
Oct
Apr
Location
🇺🇸 Chicago, USA
🇳🇱 Rotterdam, Netherlands
Terrain
Road
Road
Elevation gain
30 m
▲
15 m
PB potential
Beginner friendly
▲
World Major
✓ Yes
No
Entry type
Lottery
Open
Entry status
Check official site
Check official site
Season
Autumn · Americas
Spring · Europe
Race-day temp.
10–18°C
7–14°C
Conditions
Clear to partly cloudy, cool mornings
Cool and overcast, occasionally breezy
Humidity
50–65%
65–75%
Wind
10–20 km/h variable
10–20 km/h W
Qualifies for
Boston Marathon
Boston Marathon
Want to know how these scores are calculated? See methodology →