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.

Basic Botany & Plant ID Class

Join Boulder County Extension Agents, Sharon Bokan and Deryn Davidson to learn basic botany. Plant families have common characteristics that can be used to identify them. In this class, we will explore these characteristics and learn the characteristics of the more common plant families. Knowing the growth habits and botanical features of plants can help us manage them whether they are natives, weeds, or our landscape plants. Seating is limited. Ages 16+. Registration is required through the Parks, Open Space, and Trails JoinUs volunteer portal.
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