Events from Thursday, Sept. 17 – Wednesday, Dec. 9 › Sustainability › – City of Longmont
Events from Thursday, Sept. 17 – Wednesday, Dec. 9 › Sustainability › – City of Longmont
https://longmontcolorado.gov/events/category/sustainability/list/?tribe-bar-date=2026-01-25 — printed September 17, 2026
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Events Calendar

City of Longmont events

Featured event LevelUp Longmont Esports Tournament & Festival Saturday, Sept. 19 • 11 a.m. - 5 p.m. Longmont Museum
19 events found.

Sustainability Events

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City of Longmont events

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  • February 2026

  • Thu 12
    Two hands holding a plant in soil.

    Longmont Sustainability Coalition Meeting

    Thursday, Feb. 12 · 5:15 p.m. - 6:45 p.m.

    Curious about how Longmont is tackling sustainability and climate action and how you can be part of it? Join the Longmont Sustainability Coalition!

  • Wed 18
    City of Longmont logo against a blue background.

    REMOTE Sustainability Advisory Board (2/18/2026)

    Wednesday, Feb. 18 · 4:30 p.m. - 6:30 p.m. REMOTE Sustainability Advisory Board Series
    Virtual Event
  • March 2026

  • Wed 18
    City of Longmont logo against a blue background.

    REMOTE Sustainability Advisory Board (3/18/2026)

    Wednesday, March 18 · 4:30 p.m. - 6:30 p.m. REMOTE Sustainability Advisory Board Series
    Virtual Event
  • April 2026

  • Mon 6
    Image of a heat pump on the side of a house in a summer yard hext to grass and patio furniture

    Cool Summers, Warm Winters: A Heat Pump Info Night

    Monday, April 6 · 5:30 p.m. - 7 p.m.
    Longmont Public Library 355 Emery St., Longmont, CO, United States

    Join us for a free informational talk to learn how heat pumps can heat and cool your home, lower energy bills, and reduce pollution, and how to get started with an upgrade.

  • Wed 15
    City of Longmont Colorado logo

    IN PERSON Sustainability Advisory Board

    Wednesday, April 15 · 4:30 p.m. - 6:30 p.m. IN PERSON Sustainability Advisory Board Series
    Longmont Civic Center 350 Kimbark St., Longmont, CO, United States
  • May 2026

  • Thu 7
    Two hands holding a plant in soil.

    Longmont Sustainability Coalition Meeting

    Thursday, May 7 · 5:15 p.m. - 6:45 p.m.

    Curious about how Longmont is tackling sustainability and climate action and how you can be part of it? Join the Longmont Sustainability Coalition!

  • Sat 16
    colorful close up of flowers in bloom with butterflies pollinating them

    The Birds and the Bees and Beyond: The Inside Story of Pollination presented by Boulder County Parks and Open Space

    Saturday, May 16 · 2 p.m. - 3:30 p.m.
    Longmont Public Library 355 Emery St., Longmont, CO, United States

    Discover the many pollination strategies of plants (think beetles, butterflies, moths, wind, and water, to name a few) during this family-friendly slideshow.

  • Wed 20
    City of Longmont logo against a blue background.

    REMOTE Sustainability Advisory Board (5/20/2026)

    Wednesday, May 20 · 4:30 p.m. - 6:30 p.m. REMOTE Sustainability Advisory Board Series
    Virtual Event
  • June 2026

  • Wed 17
    City of Longmont logo against a blue background.

    REMOTE Sustainability Advisory Board

    Wednesday, June 17 · 4:30 p.m. - 6:30 p.m. REMOTE Sustainability Advisory Board Series
    Virtual Event
  • July 2026

  • Wed 8
    wooden utensils, a glass jar, a reusable mesh bag and other sustainable alternatives to single use plastic items

    Do Something Fantastic, Cut the Plastic: A Plastic Free July Event

    Wednesday, July 8 · 6 p.m. - 7:30 p.m.
    City Council Chambers 350 Kimbark Street, Longmont, Colorado

    Come explore the issues and discover solutions with community resources and a panel featuring regional waste reduction and reuse experts.

  • Wed 15
    City of Longmont Colorado logo

    IN PERSON Sustainability Advisory Board (7/15/2026)

    Wednesday, July 15 · 4:30 p.m. - 6:30 p.m. IN PERSON Sustainability Advisory Board Series
    Longmont Civic Center 350 Kimbark St., Longmont, CO, United States
  • August 2026

  • Thu 6
    Two hands holding a plant in soil.

    Longmont Sustainability Coalition Meeting

    Thursday, Aug. 6 · 5:15 p.m. - 6:45 p.m.

    Curious about how Longmont is tackling sustainability and climate action and how you can be part of it? Join the Longmont Sustainability Coalition!

  • Wed 19
    City of Longmont logo against a blue background.

    REMOTE Sustainability Advisory Board (8/19/2026)

    Wednesday, Aug. 19 · 4:30 p.m. - 6:30 p.m. REMOTE Sustainability Advisory Board Series
    Virtual Event
  • Tue 25
    Icons drawn over an image of a home indicating energy efficiency.

    Powering a Smarter Energy Future – Together

    Tuesday, Aug. 25 · 5:30 p.m. - 7 p.m.
    Longmont Public Library 355 Emery St., Longmont, CO, United States

    Learn about valuable rebates, energy-saving upgrades and practical strategies to make smarter energy choices for your home with Efficiency Works.

  • September 2026

  • Wed 16
    City of Longmont logo against a blue background.

    REMOTE Sustainability Advisory Board

    Wednesday, Sept. 16 · 4:30 p.m. - 6:30 p.m. REMOTE Sustainability Advisory Board Series
    Virtual Event
  • October 2026

  • Wed 21
    City of Longmont Colorado logo

    IN PERSON Sustainability Advisory Board (10/21/2026)

    Wednesday, Oct. 21 · 4:30 p.m. - 6:30 p.m. IN PERSON Sustainability Advisory Board Series
    Longmont Civic Center 350 Kimbark St., Longmont, CO, United States
  • November 2026

  • Thu 5
    Two hands holding a plant in soil.

    Longmont Sustainability Coalition Meeting (11/5/2026)

    Thursday, Nov. 5 · 5:15 p.m. - 6:45 p.m.

    Curious about how Longmont is tackling sustainability and climate action and how you can be part of it? Join the Longmont Sustainability Coalition!

  • Wed 18
    City of Longmont logo against a blue background.

    REMOTE Sustainability Advisory Board (11/18/2026)

    Wednesday, Nov. 18 · 4:30 p.m. - 6:30 p.m. REMOTE Sustainability Advisory Board Series
    Virtual Event
  • December 2026

  • Wed 9
    City of Longmont Colorado logo

    IN PERSON Sustainability Advisory Board (12/9/2026)

    Wednesday, Dec. 9 · 4:30 p.m. - 6:30 p.m. IN PERSON Sustainability Advisory Board Series
    Longmont Civic Center 350 Kimbark St., Longmont, CO, United States
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