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
Seattle Marathon
Best for
Newer marathonersQualifying pathway
Race B
San Francisco Marathon
Best for
Well-rounded marathon experience
Race A
Seattle Marathon
Seattle, USA
Race B
San Francisco Marathon
San Francisco, USA
Date
Nov 29, 2026
Expected July 2027
Month
Nov
Jul
Location
🇺🇸 Seattle, USA
🇺🇸 San Francisco, USA
Terrain
Road
Road
Elevation gain
▲
215 m
590 m
PB potential
▲
Beginner friendly
▲
World Major
No
No
Entry type
Open
Open
Entry status
Open
Check official site
Season
Autumn · Americas
Summer · Americas
Race-day temp.
5–12°C
11–17°C
Conditions
Pacific Northwest autumn — cool, overcast, possible drizzle
Fog in the morning over the bridge, clearing by mid-race
Humidity
72–85%
75–85%
Wind
10–20 km/h westerly
15–30 km/h — can be fierce on the bridge
Qualifies for
Boston Marathon
—
Want to know how these scores are calculated? See methodology →