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We are thrilled to introduce the Charles River Marathon Invitational. CRMI is identical to past Charles River Marathons, but geared towards runners who've completed a marathon within 20 minutes of their BQ time since Jan 1, 2023. We will also offer a limited number of time-waived entries for fundraiser runners. This flat, fast, certified course attracts runners from across the United States and overseas to Boston's beautiful Herter Park. Over 49% of our 2022 finishers qualified for the 2023 and 2024 Boston Marathons!

The race is comprised of ten laps (five for the half marathon) on a flat, fast 2.6 mile loop on paved paths around Boston's scenic Charles River, starting and finishing at the DCR’s Herter Park in Boston, MA. Our course is USATF-certified (MA23005JK), and eligible as a qualifier for the 2026 Boston Marathon.

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