Charles River Marathon Invitational

Name: Charles River Marathon Invitational
Start: 2026-09-13T11:00:00.000Z
Location: Boston, MA, USA

Boston, MA, USA

September 13, 2026

Partly cloudy throughout the day.

5 AM

Light Rain

27%

6 AM

Light Rain

27%

Details

7 AM

Light Rain

27%

8 AM

Light Rain

27%

9 AM

Light Rain

26%

10 AM

Light Rain

26%

11 AM

Light Rain

26%

12 PM

Light Rain

26%

1 PM

Light Rain

26%

Pre-Race

Race

Post-Race

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Race Overview

The Charles River Marathon Invitational is an invitation-only marathon in Boston, run on the same USATF-certified, ten-lap Charles River loop as the Charles River Marathon. Entry requires having finished a certified marathon since January 2024 within 20 minutes of a Boston qualifying time, with a limited number of fundraiser entries available. First run in September 2025, it drew a 73% Boston-qualifying rate among finishers. The race benefits the RACE Cancer Foundation's cancer research fundraising.

Wikipedia

FAQ

When is the 2026 Charles River Marathon Invitational?

The 2026 Charles River Marathon Invitational will be held on Sunday September 13, 2026.

Is the Charles River Marathon Invitational a Boston Marathon Qualfier?

Yes, the Charles River Marathon Invitational is an official Boston Marathon qualifier.

What is the time limit for the Charles River Marathon Invitational?

The time limit for the Charles River Marathon Invitational is 4.5 hours.

Charles River Marathon Invitational Course Map

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Charles River Marathon Invitational Weather History

Charles River Marathon Invitational Weather Averages

Average Temp: 62°, Average Low: 60°, Average High: 67°

Time	7AM	8AM	9AM	10AM	11AM
Temp	61°	62°	62°	62°	61°
Feel	61°	62°	62°	62°	61°
Rain	-	-	-	-	-
Wind	5mph	9mph	8mph	8mph	7mph
Dew	59°	60°	60°	60°	60°
RunScore

Charles River Marathon Invitational 2025

Sep 7, 2025

Cloudy skies throughout the day with rain in the morning and afternoon.

Low: 60°, High: 67°, Heavy Rain

Time	7AM	8AM	9AM	10AM	11AM
Temp	61°	62°	62°	62°	61°
Feel	61°	62°	62°	62°	61°
Rain	light	light	light	light	moderate
Wind	5mph	9mph	8mph	8mph	7mph
Dew	59°	60°	60°	60°	60°
RunScore