Thousands of cyclists and walkers in downtown Ottawa raised more than 2 million dollars for childhood cancer research during the 16th Défi CN [1], [2].

The event provides critical funding for the Children’s Hospital of Eastern Ontario (CHEO), allowing the institution to advance medical research and improve treatment outcomes for pediatric patients fighting cancer.

More than 6,200 participants took part in the event [3]. The crowd of cyclists and walkers filled the streets of downtown Ottawa to support the cause. This year's participation marked a significant turnout for the annual challenge, which has become a staple of the city's philanthropic calendar.

Fundraising totals for the event reached a record high. While some reports indicate the total exceeded 2 million dollars [1], other records specify the amount raised was 2.1 million dollars [2]. These funds are designated specifically for research into childhood cancers at CHEO.

The Défi CN has now completed 16 editions [3]. The event combines physical activity with community fundraising to address the specific needs of children facing cancer diagnoses. By mobilizing thousands of citizens, the event leverages local community support to fund high-level scientific research.

Organizers focused on the goal of improving survival rates and quality of life for young patients. The scale of the 16th edition reflects a growing commitment from the Ottawa community to support pediatric healthcare, and specialized research initiatives.

More than 6,200 participants took part in the event.

The record-breaking fundraising total demonstrates the high level of community mobilization in Ottawa for pediatric health. By securing over 2 million dollars, CHEO can expand its research capabilities, which is vital for developing targeted therapies for childhood cancers that often require different approaches than adult oncology.