Tartan Ottawa International Marathon

The Tartan Ottawa International Marathon takes runners through Canada's capital city in June, a time when Ottawa comes alive with summer energy. The race is part of the larger Tamarack Ottawa Race Weekend, a major running festival that draws participants from across the region. The event benefits from the city's well-developed infrastructure and community support, with medical services, volunteer support, and recovery zones integrated throughout the weekend experience. The course itself is a trail marathon that stays relatively flat with gentle rolling sections, making it approachable for most fitness levels without being boring. Runners will spend the day on trail terrain, which adds a different feel from road marathons and requires slightly more attention to footwork. The elevation profile is modest, ranging between roughly 50 and 85 meters above sea level across the full distance, so you won't face any serious climbs. What you should expect is a steady, runnable day where the terrain is the main variable to manage rather than dramatic elevation changes.