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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.

Night Sky Revealed: Evening Astronomy Event

Presented by the Longmont Astronomical Society

  • Date: 05/10/2019 9:00 PM - 11:00 PM
  • Location: Sandstone Ranch Visitors & Learning Center
    3001 Sandstone Drive
    Longmont, Colorado 80504
  • Introduction: Join the Longmont Astronomical Society for a free short presentation, then head outdoors to view the night skies.

Night Sky Revealed

Join the Longmont Astronomical Society for a free short presentation, then head outdoors to view the night skies. View craters, rills and valleys on the moon; enjoy seeing Jupiter and its moons; and take a summertime tour of globular clusters, nebulas and galaxies.  Telescopes provided or bring your own.

Preregistration for each person attending is encouraged online by clicking here or by calling 303-651-8404.  All programs are family-friendly unless otherwise noted.

Location / Directions

Sandstone Ranch Visitors & Learning Center
3001 Sandstone Drive, Longmont, CO 80504

To get to Sandstone Ranch from Longmont, go east on Ken Pratt Boulevard / Highway 119, past the intersection of Weld County Road (WCR) 1. The ballpark facilities are located on the south side of the road, 1/2 mile east of WCR 1. The Visitors & Learning Center, sports field complex, skate park, adventure playground and picnic shelter are located on the south side of the road, 1 mile east of WCR 1. View pdf map.

Learn more about upcoming activities at the Sandstone Ranch Visitors Center here.

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