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
NN Rotterdam Marathon
Best for
Elite PB chasingFirst marathonsFlat-course PBs
Race B
Valencia Trinidad Alfonso Marathon
Best for
Elite PB chasingNewer marathonersFlat-course PBs
Race A
NN Rotterdam Marathon
Rotterdam, Netherlands
Race B
Valencia Trinidad Alfonso Marathon
Valencia, Spain
Date
Expected April 2027
Dec 6, 2026
Month
Apr
Dec
Location
🇳🇱 Rotterdam, Netherlands
🇪🇸 Valencia, Spain
Terrain
Road
Road
Elevation gain
▲
15 m
36 m
PB potential
Beginner friendly
▲
World Major
No
No
Entry type
Open
Open
Entry status
Check official site
Registration open
Season
Spring · Europe
Winter · Europe
Race-day temp.
7–14°C
10–16°C
Conditions
Cool and overcast, occasionally breezy
Clear and cool, ideal racing weather
Humidity
65–75%
55–65%
Wind
10–20 km/h W
10–15 km/h W
Qualifies for
Boston Marathon
Boston Marathon
Want to know how these scores are calculated? See methodology →