🇨🇦Ottawa, Canada
Tamarack Ottawa Marathon
Expected May 2027
Race facts
Next edition · 2027
Expected May 2027
Date not yet confirmedEstimated from the usual calendar slot. Last edition: May 24, 2026.
Course
95 melevation gain
- Distance · surface
- 42.2 km · Road
Entry
Open entry
- 2027 entry
- Not yet recorded. Check the official site for dates and status.
Dates and entry details change. Confirm with the organiser before you book.
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 →Find your next race
Races runners like you consider
Similar to Tamarack Ottawa Marathon
Toronto, Canada
Scotiabank Toronto Waterfront Marathon
Oct 18, 2026
Open- Entry
- Open entry
- Course
- Flat · ↑ 70 m
A 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.
World MajorBoston, USA
Boston Marathon
Apr 2027 (est.)
- Entry
- Qualifier
- Course
- Rolling · ↑ 247 m
The world's oldest annual marathon, demanding a qualifying time and a fearless approach to the Newton Hills.
Race intelligence verified
Philadelphia, USA
Philadelphia Marathon
Nov 22, 2026
Open- Entry
- Open entry
- Course
- Rolling · ↑ 205 m
America's birthplace hosts one of its most historic marathons — through Fairmount Park, past the Philadelphia Museum of Art steps, and along the Schuylkill River.
More fast, PB-friendly courses
See all →
World MajorChicago, USA
Bank of America Chicago Marathon
Oct 2027 (est.)
- Entry
- Lottery
- Course
- Flat · ↑ 30 m
The flattest World Major — a loop through 29 of Chicago's neighbourhoods with the most inclusive crowd energy in American marathon running.
Race intelligence verified
Sacramento, USA
California International Marathon
Dec 6, 2026
Open- Entry
- Open entry
- Course
- Rolling · ↑ 110 m
California's fastest marathon — a net-downhill point-to-point from Folsom to Sacramento, the most popular Boston qualifier on the US west coast.
Houston, USA
Chevron Houston Marathon
Jan 2027 (est.)
- Entry
- Open entry
- Course
- Flat · ↑ 45 m
One of America's flattest and fastest January marathons — a near-sea-level loop through downtown Houston and Memorial Park with world-class PB credentials.
Great for a first marathon
See all →Buenos Aires, Argentina
Maratón de Buenos Aires
Oct 2027 (est.)
- Entry
- Open entry
- Course
- Flat · ↑ 35 m
South America's flattest and fastest marathon — a stunning loop through Buenos Aires' European-style boulevards, Palermo parks, and the Puerto Madero waterfront.
Montevideo, Uruguay
Maratón de Montevideo
Jun 2027 (est.)
- Entry
- Open entry
- Course
- Flat · ↑ 60 m
Uruguay's capital hosts a flat, fast marathon along the Rambla coastal promenade — 22km of waterfront running along the Río de la Plata in Southern Hemisphere winter.
Minneapolis, USA
Medtronic Twin Cities Marathon
Oct 2027 (est.)
- Entry
- Open entry
- Course
- Flat · ↑ 80 m
Consistently rated America's most beautiful urban marathon — a point-to-point through Minneapolis and St. Paul's famous chain of lakes and riverside parkways.
Explore the region
More Americas marathons
World MajorChicago, USA
Bank of America Chicago Marathon
Oct 2027 (est.)
- Entry
- Lottery
- Course
- Flat · ↑ 30 m
The flattest World Major — a loop through 29 of Chicago's neighbourhoods with the most inclusive crowd energy in American marathon running.
Race intelligence verified
Houston, USA
Chevron Houston Marathon
Jan 2027 (est.)
- Entry
- Open entry
- Course
- Flat · ↑ 45 m
One 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
Open- Entry
- Open entry
- Course
- Rolling · ↑ 110 m
California's fastest marathon — a net-downhill point-to-point from Folsom to Sacramento, the most popular Boston qualifier on the US west coast.