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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. This is not a comprehensive list of all activities happening around the community. Dates and times of these events are subject to change without notice.

Holiday Closures

Trash, Recycling, & Composting - Holidays & Events

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.


Amazing Astronomy - CANCELLED

Presented by the Longmont Astronomical Society

  • Date: 03/27/2020 6:30 PM - 8:30 PM  
  • Location: Sandstone Ranch Visitors & Learning Center
    3001 Sandstone Drive
    Longmont, Colorado 80504
  • Introduction: Come for an informative beginners astronomy lecture indoors, then weather permitting, head outdoors to view the night skies. Telescopes provided or bring your own.

Amazing Astronomy

Come for an informative beginners astronomy lecture indoors at 6:30pm, Friday, March 27 at the Sandstone Ranch Visitors Center, 3001 Sandstone Drive. Weather permitting, head outdoors to view the night skies until 8:30pm.  Presented by the Longmont Astronomical Society. All ages welcome. Dress for the weather.

Free registration is required by calling 303-651-8404 or by visiting our online registration system (keyword SSRVLC).  Programs at the Visitors Center have a suggested donation of $2/child, $4/adult, collected at the event.  

Click here for a map to the Visitors Center.

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