Citywide Calendar

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Welcome to Longmont's Calendar of Events!

The events listed on this Calendar are City of Longmont sponsored events and is not a comprehensive list of all activities happening around the community. Dates and times of these events are subject to change without notice.

Trash, Recycling, & Composting - Holidays & Events

View via the address-based Online Collection Calendar and sign up for reminders.

Other Community Events

To view other events being held around Longmont, please visit the Longmont visitors bureau events calendar at

Subscribe to the City Calendar

To get events emailed to you directly, sign up for the Calendar eNotifications and then select the Calendar categories.

Button Rock Preserve: Protecting Longmont's Watershed

The inspirational legacy of Ansel Adams includes his major significance as an environmentalist. Learn about one of Longmont’s most important environmental resources: water. Find out what it takes to manage the water, forests, and recreation at Button Rock Preserve. Watershed Ranger Jamie Freel will explore these topics and share stories from the flood of 2013. 

Call the box office for free tickets 303-651-8374 or get online

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