Ultra Runner Beats Stage 4 Cancer, Returns to Racing

Olivier Duhaime knows what it means to push through pain. The Gatineau ultramarathoner has finished four Ironmans, eight ultras, and once ran 443 kilometers from Quebec City to Ottawa in just six days.

But nothing prepared him for late 2021, when chest pain led to a devastating diagnosis. Doctors found three tumors along his spine and near his heart. His daughter was only eight months old.

"I was just learning how to be a dad," Duhaime says. "I never imagined cancer. There's no history of it in the family, so it was a big shock."

After six months of chemotherapy at Ottawa Hospital, he reached remission in September 2022. Two months later, the cancer returned at Stage 4. The tumors kept growing despite treatment.

"I was at my lowest point," Duhaime remembers. "But like in an ultra, you hit your lowest point, but you know you're going to bounce back."

He chose a high-risk option: six consecutive days of eight-hour chemo sessions. It worked. In May 2023, he received a bone marrow transplant and was discharged after just 10 days.

By 2025, he was running again. He tackled a 35-kilometer trail race, then a 30K. Now he's training for the Ottawa Marathon on May 24, exactly three years after beating cancer.

"Just being on the start line will be a win," he says. "It will be emotional."

Why This Inspires

Duhaime isn't just running for himself. He's fundraising for Ottawa Hospital Foundation's Campaign to Create Tomorrow, a $500 million initiative to build one of Canada's most innovative regional cancer centers. The campaign has already raised $396 million.

"It's because of your donations that people like me can hope to live a normal life again after cancer," he explains.

His goal time? Around 3:30, about 24 minutes slower than his pre-cancer personal best. But speed doesn't matter when you're running with a second chance at life and two young daughters cheering you on.

Every step across that finish line will honor the 51 chemo sessions, the transplant, and the team who refused to give up on him.