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
Tamarack Ottawa Marathon
Best for
Strong PB attemptsNewer marathonersFlat-course PBs
Race B
Scotiabank Toronto Waterfront Marathon
Best for
Elite PB chasingFlat-course PBs
Race A
Tamarack Ottawa Marathon
Ottawa, Canada
Race B
Scotiabank Toronto Waterfront Marathon
Toronto, Canada
Date
Expected May 2027
Oct 18, 2026
Month
May
Oct
Location
🇨🇦 Ottawa, Canada
🇨🇦 Toronto, Canada
Terrain
Road
Road
Elevation gain
95 m
▲
70 m
PB potential
▲
Beginner friendly
▲
World Major
No
No
Entry type
Open
Open
Entry status
Check official site
Open
Season
Spring · Americas
Autumn · Americas
Race-day temp.
10–19°C
8–15°C
Conditions
Canadian spring — tulip season, often sunny
Cool Canadian autumn — consistently excellent racing conditions
Humidity
50–65%
55–70%
Wind
10–20 km/h
10–20 km/h off Lake Ontario
Qualifies for
Boston Marathon
—
Want to know how these scores are calculated? See methodology →