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Ali on the Run Show

Ali on the Run Show

912. Siobhan Donovan, Marathoner with Stage IV Breast Cancer

Oct 22, 2026 · 1h 37m

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"It's less scary if you face it. If you avoid it, it grows. It becomes scarier. Sometimes it's better to just face things head on." In April 2022, Siobhan Donovan was 33 years old. She was 36 weeks pregnant with her third child when she thought she had a clogged milk duct. It turned out to be stage IV breast cancer that had already spread to her bones. The doctors induced labor, and when Siobhan's son was four days old, she went to Dana-Farber Cancer Institute to begin aggressive treatment, starting with 27 grueling rounds of weekly chemotherapy — with a newborn in tow. Siobhan's treatment worked: By 2024, she had achieved No Evidence of Active Disease status, and was training for the…