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If you know of any events of interest please reach out to calendar@onemontgomerygreen.org

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2026 GreenFest

April 25 @ 11:00 am - 4:00 pm

The Montgomery County GreenFest is the largest environmental festival in Montgomery County, MD, and is made possible thanks to a coalition of public, private and nonprofit partners.

250 Actions

Montgomery County GreenFest is going big in 2026! To honor the 250th anniversary of Montgomery County (founded in 1776), this year’s theme centers on legacy and collective action. We invite every resident to celebrate Montgomery County’s 250 years by committing to 250 actions that safeguard our environment and public health.

For more Information: https://montgomerycountygreenfest.org/

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