🇨🇦Ottawa, Canada
Tamarack Ottawa Marathon
Expected May 2027
Distance
42.2 km
Elevation gain
95 m
Terrain
Road
Entry type
Open entry
PB potential
Excellent PB course — flat, fast, and well-paced
Beginner friendly
Great for newcomers — manageable course, strong support
About this race
Ottawa's marathon coincides with the Canadian Tulip Festival — millions of tulips in bloom along the course make this one of North America's most visually striking spring races. The near-flat course runs along the Ottawa River Parkway, through the leafy Gatineau Hills on the Quebec side, and past Parliament Hill and the Rideau Canal. With 95m of elevation and May conditions of 10–18°C, this is a genuine PB course. Ottawa's organisation is exceptional — the capital city's resources mean meticulous race management, reliable pacers, and a polished expo. The bilingual course reflects Canada's character: cheering crowds mix English and French encouragement as runners pass through both Ontario and Quebec.
Typical race-day weather
Temperature
10–19°C
Humidity
50–65%
Conditions
Canadian spring — tulip season, often sunny
Wind
10–20 km/h
Qualifies for
Entry information
Next edition date estimated — confirm exact date with the official site.
Pace Band
Generate a free elevation-adjusted pace band for Tamarack Ottawa Marathon. Print it, wear it, hit your splits.
Build my pace band →More races
You might also like
World MajorBoston, USA
Boston Marathon
Apr 20, 2027 · Road · ↑ 247 m
Bib transfer openThe world's oldest annual marathon, demanding a qualifying time and a fearless approach to the Newton Hills.
Philadelphia, USA
Philadelphia Marathon
Nov 22, 2026 · Road · ↑ 205 m
OpenAmerica's birthplace hosts one of its most historic marathons — through Fairmount Park, past the Philadelphia Museum of Art steps, and along the Schuylkill River.
Toronto, Canada
Scotiabank Toronto Waterfront Marathon
Oct 18, 2026 · Road · ↑ 70 m
OpenA World Athletics Gold Label race and one of North America's most underrated PB courses — flat, fast, and perfectly timed in Toronto's ideal October conditions.
Explore the region
More Americas marathons
World MajorChicago, USA
Bank of America Chicago Marathon
Oct 11, 2026 · Road · ↑ 30 m
Lottery soonThe flattest World Major — a loop through 29 of Chicago's neighbourhoods with the most inclusive crowd energy in American marathon running.
Houston, USA
Chevron Houston Marathon
Jan 18, 2027 · Road · ↑ 45 m
OpenOne of America's flattest and fastest January marathons — a near-sea-level loop through downtown Houston and Memorial Park with world-class PB credentials.
Sacramento, USA
California International Marathon
Dec 6, 2026 · Road · ↑ 110 m
OpenCalifornia's fastest marathon — a net-downhill point-to-point from Folsom to Sacramento, the most popular Boston qualifier on the US west coast.