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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 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 VisitLongmont.org.

Subscribe to the City Calendar

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

Rhythm on the River

Rhythm Reversed - Get Your Glow On!

  • Date: 07/13/2018 6:00 PM - 10:00 PM
  • Location: Roger's Grove Nature Area
    220 Hover Road
    Longmont, Colorado 80503
  • Introduction: Longmont's signature summer event filled with music, food & drink, art, FUN! Free admission.

Rhythm on the River - Rhythm Reversed

Get your glow on!  Enjoy activities and Night Light Fun at Rhythm on the River, Longmont’s signature zero-waste event, as we celebrate the environment, the community, art and music. Hours are Friday and Saturday July 13-14 from 6-10pm.  Black lights throughout the venue will fluoresce white clothing. Free admission. Free parking and shuttle service is available at the Boulder County Fairgrounds. Click to view a complete list of all of the activities and entertainers. Questions? Call 303-651-8404.
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