Photo: © Run OttawaMARATHON21K10K5K
Tamarack Ottawa Race Weekend
Ottawa, CanadaChoose the distanceTap a distance: the course, fees, times and rules below update for that race.
At a glance
Tamarack Ottawa Race Weekend 2027 takes place on 29 May 2027 – 30 May 2027 in Ottawa, Canada. Distances: 42.195 km, 21.098 km, 10 km, 5 km, 2 km. First start at 07:00.
- Date
- Saturday, 29 May 2027 – Sunday, 30 May 2027
- Location
- Ottawa, Canada
- Distances
- Tamarack Ottawa International Marathon · 42.195 km · Competitive
- Ottawa Half Marathon · 21.098 km · Competitive
- Ottawa 10K · Competitive
- 5 km · Competitive
- 2 km · Non-competitive
- Start times
- 07:00
- Registration
- Registration open · Register now ↗
- Organiser
- Run Ottawa ↗
- Official website
- runottawa.ca ↗
Last updated: 19 October 2026
The race
Tamarack Ottawa Race Weekend takes place from 29 to 30 May 2027 in Ottawa (Ontario, Canada). The programme includes: Tamarack Ottawa International Marathon (Sunday 30 May, at 7:00), Ottawa Half Marathon (Sunday 30 May), Ottawa 10K, 5 km and 2 km.
The course runs along the Rideau Canal and past Dow's Lake; in 2027 the 10K hosts the Canadian 10K championships. Organised by Run Ottawa.
Where it is
Ottawa · Canada© OpenStreetMap · OpenFreeMap
