Runners spread across a city avenue during a marathon

Niagara Falls International Marathon

The Niagara Falls International Marathon is a road race held in Niagara Falls, Ontario, finishing in sight of the Falls. It offers four distances from 5K to the marathon and dates back to 1974.

Prepare for Niagara Falls International Marathon

A plan built from your answers and your race date.

The Niagara Falls International Marathon is run in Niagara Falls, Ontario, on a paved course that follows the Niagara corridor before turning into the Falls district for the finish. The scenery is the main draw: the closing stretch runs toward one of the best-known waterfalls in North America, under late-autumn light.

The event has been on the calendar since 1974, making it one of Ontario's longest-running marathons. Four distances share the day, from 5K to the full marathon, on a generally flat, rolling profile that suits runners looking for a time.

The formats

4 formats on the program.

Format	Distance
Marathon	26.2 mi
Half Marathon	13.1 mi
10K	6 mi
5K	3 mi

Organizer information, checked on September 21, 2026 · niagarafallsmarathon.com

When to start

At this distance, a build usually runs 12 to 20 weeks. The 2027 date is not published, so counting back from October puts the start around May 24, 2027.

These ranges are working conventions, not a research finding — no trial has compared plan lengths against each other. What matters more is that the plan was built for the weeks you actually have, rather than shrunk down from a longer one.

How to choose your start date

When to start

May 24, 2027

→ July 19, 2027

Worth reading before you enter

Races and distances 10K, half, marathon: what each one really asks They are all running. They are not the same event. What limits you, how long you need, and how the race falls apart — all three change with the distance. Read Races and distances The big marathons: what each one actually demands A marathon is 42.195 km everywhere. What changes is the profile, the crowd, the weather you are likely to get — and so what your training should emphasise. Read Training Eating and drinking: what’s proven, what isn’t This is where confident advice most often runs ahead of the evidence. Some of it is well tested. Some is opinion wearing a number. And one common habit can kill you. Read

Questions

What is the date of Niagara Falls International Marathon in 2027?

The organizer has not published the 2027 date for Niagara Falls International Marathon yet. The race is usually held in October, in Niagara Falls.

Is the Niagara Falls Marathon course hard?

The course is paved, generally flat and not technical, finishing near the Falls. The hardest part is usually the late-October weather along the river, which can be cold and windy on exposed sections.

What distances does the Niagara Falls International Marathon offer?

1 km half marathon, a 10K and a 5K. The event has been part of the running calendar since 1974.

Other races

This list keeps growing; it draws no line. A race that is missing is prepared for in exactly the same way.

Mississauga · CanadaMarathon Beneva Mississauga Marathon Apr 25 Its marathon is known for a net downhill profile and serves as a Boston qualifier. Vancouver · CanadaMarathon BMO Vancouver Marathon May 2 The race is run in Vancouver, between the Pacific and the Coast Mountains. Halifax · CanadaMarathon Medavie Blue Nose Marathon May 21 It features a marathon, half marathon, 10K, 5K and team relay starting at the Emera Oval. Your race is not here? Tell us about your race You can prepare for it all the same. Any race, anywhere, and even a goal without a race.

Your race is on the calendar. Your plan should be too.

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