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Grandma's Marathon is a marathon running event held in Duluth, MN on Jun 20, 2026. It draws 9,500 competitors and is a Boston Marathon qualifier. The race features a $33K prize purse. The course features net elevation loss — ideal for time goals.
Trehko tracks registration status, entry fees, and deadlines for Grandma's Marathon and thousands of other endurance races. Use the app to set a registration reminder and build a training plan tailored to race day.
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