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  • Banner shows images of cyclists smiling on their bikes. Bikes Not Bombs' 38th Bike-A-Thon is on Sunday June 8th 2025.

    38th Annual Bike-A-Thon [6/8/25]

    Stony Brook Field Southwest Corridor Park &, Boylston St, Boston, MA, United States

    The Bike-A-Thon is our biggest annual fundraiser, bringing together more than 500 riders and 100 volunteers in a ride for social change. Choose one of our three scenic routes, enjoy a supported…

  • Infographic with map, bike, train, and car illustrations that includes event information for the Great Commuter Challenge.

    Great Commuter Challenge [August 16th]

    Bikes Not Bombs 284 Amory Street, Jamaica Plain, MA, United States

    Join Bikes Not Bombs & friends on Saturday August 16th to explore Boston and compete in a multi-modal scavenger hunt: the Great Commuter Challenge! Teams of 2 to 5 people…

  • Century Challenge [9/14/2025]

    Bikes Not Bombs 284 Amory Street, Jamaica Plain, MA, United States

    On Sunday, September 14th, we will host the “Century Challenge” fundraiser! This includes the metric century (100 kilometers) and imperial century (105-mile) routes you know and love! View the Event Page…

  • 39th Annual Bike-A-Thon [5/17/26]

    Stony Brook Field Southwest Corridor Park &, Boylston St, Boston, MA, United States

    The Bike-A-Thon is our biggest annual fundraiser, bringing together more than 500 riders and 100 volunteers in a ride for social change. Choose one of our three scenic routes, enjoy a supported…