The annual Tamarack Ottawa Race Weekend welcomes close to 45,000 participants in six races, including the Scotiabank Ottawa Marathon, the Scotiabank Half Marathon, the Ottawa 10K, the HTG Sports 5K, the Ottawa 2K and Scotiabank Ottawa Kids Marathon.

The Tamarack Ottawa Race Weekend is one of only two running events in the world to host two IAAF Gold Label races – the Ottawa 10K and the Scotiabank Ottawa Marath

Late May